Hi,
<br />Two things in my experience:
<br />First: I would ask your doctor about testing for MAC (Mycobacterium ascessus). When I had my freefall, this was my issue.
<br />
<br />Second: EXERCISE, EXERCISE, EXERCISE! =) I am 27% FEV1 and I do the bike/treadmill 3x's a week! It saved my life...