I was waiting for test results to post any more. Yes, I did read your reply & jotted down "Histoplasmosis" to ask doc about...I was in caverns in Blue Ridge mountains in 1999; but that is the only place I could think of that I might have picked this up...IF that is what it is.
Hope to learn more from the pulmonologist on Monday. In the mean time just praying that it is not "C".
It is certainly frustrating to go through all the testing (like you did) and no one seems to know! Guess it just takes time to rule out other things....which is O.K. by me! Better than no hope!
Thanks for replying & I'm glad you found the answer to your "problem".