Please consider getting tested for Babesia (a co-infection that causes lyme disease). Shortness of breath is a big side effect of Babesia.
Mainstream testing for lyme and it's co-infections is a JOKE.
Call Igeniex Labs...they will mail you a free lab kit.
All you do, is get a doctor's order for a blood draw, and then go to your nearest lab and get your blood drawn. Specifically tell the lab that you want your blood sent to Igenex. The only insurance Igenex accepts is medicare.
IGeneX, Inc.
795 San Antonio Rd
Palo Alto, CA 94303
I also agree with the poster that says to get yourself cleaned out and on anti-parasitic herbs etc.
Further, enzymes such as serrapeptase and nattokinase have been proven to drastically improve lung function in many different ailments....you may want to try these while you continue to search for answers. Also, LOTS of pure vitamin C and water each day.