Hi Katie,My daughter was not diagnosed until age 6 years old. Even though her first cousin has C.F. We were furious with the Doctors - we were told she had bronchitis, asthma etc. Rochelle is almost 14 now - she's 5'7" tall and weighs around 128 lbs. and is doing great. She takes her enzymes, vitamins daily along with the regimen of mask/pari pep. For exercising she skips - terrific for getting her to cough. Chest physio is done twice daily (mostly) but she hates it and rebels now and then. Overall she is quite compliant. Keep up with all your daily therapies etc. We live in Canada and don't have the vest. Interested to hear your daily routine. All the best, Colette.