Sunny9432,
Forgive yourself for taking 12 years to arrive at a diagnosis. As Printer noted, you will discover people on this site who weren't diagnosed until 30, 40, 50 even 74, and not just a few anomalies. Hindsight is great if you want to catalog all of the CF symptoms in retrospect, but I am plenty smart, I have smart doctors and as a nurse, you should know better than most that the story of the blind men and the elephant is endemic in medicine.
I was diagnosed by sweat test in 2001 at age 51. After that I had genetic testing and was declared Atypical CF because my lungs still worked and they found just one CFTR (Cystic Fibrosis Transmembrane ((electrolyte conductance)) Regulator) gene mutation. My brand new CF specialist looked over my genetic assay and said "so, you're just a carrier? It wasn't a happy moment, I didn't want CF, but I had been battling "The worst case of whatever you have,... that we've seen" diagnosis since I could remember. I assumed that I had inherited a number of bad genes for most of my life.
Taking the approach of seeing the appropriate specialist for each individual problem works for the most part. Big things fell through the cracks like malnutrition, malabsorption and the involvement of my pancreas and gut, common in CF but uncommon in the general population. Discovering that I was suffering the diseases of malnutrition/malabsorption for fifty years, osteoporosis, arthritis and such, was a shock. My CF diagnosis is still atypical because I do not have penetration of CF into my lungs. Just a guess, but your son may be the same. I have had enough post nasal drip to choke on, and a common occurrence is aspirating that thick, infected goo. I aspirate food as well and a night time aspiration gives me pneumonia too frequently. Still, this is an inconvenience, I don't require daily nebulizing, use a vibratory vest or anything except when I am kicking a round of pneumonia.
My old GI doctor always noted a mess of mucus in my stomach whenever I had an upper endoscopy. The average person swallows a liter of mucus daily. CFers make at least as much but the viscosity and potential infection swallowed is enough to make one sick. The stomach can't easily pass the thick mucus so it's always mushing it around. Vomiting is more common with CF, sometimes by a lot. Just keep a tighter schedule of having him scoped from both ends. With kids, that is likely zero, but esophegeal cancer, pancreatic and liver cancer are more common. I am not wanting to alarm you, if any kid is vomiting weekly or more, it's important to watch it. These are rare cancers for younger CFers, not much more than a healthy child, depending on the severity of the CF. It is a good thing for him to remember as he takes charge of his own medical care.
My poor mother, actually both parents, but my mother was playing medical detective from 1950 on. I had all the usual head and chest infections up until about the age of your son. The fact that your son feared blood in the stool probably means that he too has become a close observer of his BM's. This will serve him well because bowel nirvana is a moving target with CF. His lungs are of paramount importance as is getting established with a good CF Center. This usually means contacting the CF Foundation (CFF.org) to find the closest accredited CF clinic if you aren't happy with your clinic. Being a juvenile, he has a better chance of finding a clinic. Adult diagnosed CFers used to be rare. As a geneticist, I am fairly certain that the 35,000 or so CF patients in the U.S. is probably off by 200,000 or so. Time will tell.
To compare life for a sick kid in the 1950's or before those darling ear tubes they put in kids prone to ear infection, they had to wait until you either blew an ear drum or. God help me, they lanced the infected ear drums. I endured this exactly twice. The first time, at about age 6, the doctor put most of his upper body into holding me down and then BOOM!!! I was up in the exam room cabinets, and nothing or nobody was getting me down. My doctor was a huge 6'4" man but it took him, my mother and two other people to pry me out of the furniture and lay me down for a repeat performance on the other ear.
By your son's age, it was apparent that I was becoming the medical miniature of my father, probably a CF patient himself. He had ulcers, I had gastritis, he was seriously constipated, I was constipated and so on. I was even taking the same medicines as my father, in lower dosages. If my life was no more complicated than constipation and the habit of catching every respiratory bug going around, I might complain, but it would be livable.
Food makes me sick. It made me sick as a child and it makes me sick today. I believe one of my attractions to the "Lost in Space" science fiction world was the idea of swallowing a few pills and nutrition be satisfied was quite compelling. By my teens, like most boys I was devouring anything food. We had built a calorimeter in science class large enough to place a meal in. I was devouring 3000-5000 Calories daily, fairly healthy food for the most part. From as young as I can remember I won the skinniest kid in the class award. Not really aware of the mark on my back for budding bullies, I amazed my fellow kids with a strong flashlight, glowing through the flesh in my hand, arm or whatever, revealing moving bones just like a fluorescope. The fact that your son has a particular stool pattern, my guess is he is going to present GI dominance in his CF. I hope. People underestimate how debilitating a dysfunctional gut can be. As a nurse, you know already that the gut is the center of our immune system, and that gut feeling is more than an analogy. Our emotional health and psyche can create calm or chaos in the gut. It has the same effect the other way, IMHO. As he builds a CF team, a counselor might become and important asset, for now he has you, and you might need to offload your fears and worries, since your normal support group is usually involved family.
His love of salt is good. Although the usual salt is important, CFers really need the entire electrolyte series to be properly balanced. Super hydration for a normal kid is what should be his norm. I hate drinking water, I don't know if this is my own aversion but beware, most of my life I was chronically dehydrated, if it is a CF thing, and it could be, kidney stones will eventually challenge that assumption, and habit. I had more than I can count, seriously. It would be like forgetting how many kids you gave birth to, but I used to produce "gravel" and I still couldn't get past proper hydration. They were so frequent, when gallstone attacks were starting to happen, my doctor kept looking for the wrong kind of stone. Why wouldn't he, I am not FFF rather male, thin and in my thirties. You need better advice concerning his gallbladder, just be aware, it may be sluggish and could be contributing to his odd stools. Mine was simply removed. I think things are different now for kids.
A recent scientific article, possibly in "GUT", found a correlation between very high sweat test numbers and GI dominance in CF. Your son rung the bell at 105. I imagine your son's new doctor has said something about supplemental enzymes. I can't emphasize enough, become an expert on enzymes. The process is dose titration and in my limited experience, it is extremely difficult for a doctor or nutritionist to wrap their brains around adequate enzymes without personally having CF. There is a fecal elastase test that can determine approximately how good or bad digestion is. It is based on the patient consuming at least 100g of fat/day for an adult, there may be a pediatric chart, but when I had my most important test, they failed to ask if I consumed anything close to 4 ounces of fat daily. I didn't.
Big numbers are scary and Creon 12, for example has 12,000IU of Lipase and similar numbers on the other included enzymes. Don't be put off by the numbers, these are enzymes digesting meals. The fact that his stools are toilet stoppers can be superficially handled by having him flush frequently, assuming he isn't depositing a softball sized stool in one move. You mention hard and voluminous formed stools, not diarrhea. It sounds like you are implying they are at least pliant stools with the reference to diarrhea. As the doctor adjusts his enzyme routine, get your son comfortable about discussing the quality of his BM. Enzymes at first are like manna from heaven, but it might not last at the initial level. His stool volume, the odor and embarrassing overflows almost certainly will be helped with supplemental enzymes.
To understand the potential problems with maldigestion, which of course means malabsorption, the fecal volume will be reduced by supplemental enzymes digesting the meal much better. Nutrients are absorbed and used by your son rather than surrendering them to probiotics in the gut, which are little gas factories making his stools larger. From this point, I am going to refer you to another current post under Adults on this site titled DIOS. I wrote more than you need to know about enzymes in my piece of that thread. I don't mean to be lazy, but if you want information, there's plenty on this site.
As for your child's life, Printer's life seems to be more common than not. Maybe it is all the stress hormones fighting infections and inefficiencies called to overwork our immune system and what's left spins in the brain, or the phase of the moon when we were all born, but something makes CFers fighters, and often exceeding their wildest dreams. I certainly have.
LL