Don't know what could help. Sounds like all your other things are messing with your lungs/asthma. That happens to me too. Does prednisone ever help you? Last time that only helped as long as I was taking it; a couple days from the end when I was tapering, the asthma was coming back just as fast.

Sounds like you have a systemic thing happening. With my background, I'd have my "gut" checked, intestines, etc.? They can throw your system off (too many antibiotics, etc.) just like bad teeth can.