Hi, I am by no means an expert in this whole thing, like so many of the other people here are, but I wanted to just add my two cents and support. The genetics tests are really important, and the longest wait. But hang in there, they will tell you a whole lot more. My son is 7 years old and we have suffered a full life-time of symptoms with him and have only just gotten a clinical CF diagnosis.
The first days after appointments are always the hardest for us. We find ourselves just listening and nodding at the actual appt. and then we go home and about a day and a half later, it all sinks in and we freak out. But, mind you, this has gone on for us for seven years. We have sort of become experts in the stress management game. I can say that it will get better, even if he has CF, you will know what you are up against. If it is not, you will have learned one serious lesson in patience and grace. Our son didn't have symptoms until he was four months and had is first round of RSV. His digestion wasn't bad until he tried eating food at one year old. I guess what I am trying to say is that patience is the best tool to get you through because everyone is different, even with the same disease and you will drive yourself crazy (been there done that) if you try to figure it out on your own.
So, we are all here hoping you get to exit the CF scene as quickly as you entered and to tell you that either way, it will get better. Have faith, ask questions and always know you are not alone. Find your coping zone until the next round of info comes in but believe that you have what it takes as such a loving father to endure whatever comes your way. I am thinking of you and hoping for good news.