My daughter is 11 years old and was diagnosed with CF at 8 years old. They had a hard time diagnosing her before the CF dianosis, but now they still have trouble. She has started having tightness in her chest and saying she cant breathe. We did xrays and cat scans and they came back good. Still does not answer the question of why she feels like there are bricks sitting on her chest and like she is breathing in glue. She has had 10 days of oral prednisone, 14 of augmentin and now another 14 of clindamycin. She stated throwing up yesterday and it was mostly mucus. Oh and she used to have mucus coming up all the time, the last 3 weeks, when this started, she has had none!!! Help Please!!!