I'm assuming your doctor would refer you to a Cystic Fibrosis center or specialist where you'd most likely get some bloodwork and xrays done, sputum cultures to see if you're growing any common CF bugs. Maybe get prescribed some antibiotics if you are culturing something. Vitamins. Bronchodilators to be nebulized such as albuterol, maybe hypertonic saline as well to help open up the airways and to help move out any mucus. In the states most people do a minimum of 2 chest physiotherapy treatments (CPT) a day, use a nebulizer during that time. Most are pancreatic insufficient and need to take digestive enzymes to help digest fats and protein.
Basically get into a routine to keep your lungs happy and healthy. I'm sure it's overwhelming, but since you've been dealing with health issues for years, I can't help but think you'll feel much better with regular treatments, medications...