@cookie2009, I'm glad to hear that there's some improvement. That's interesting about what he said about it being about the feeling. I've wondered that for a long time, because most people here, including myself, have always had normal O2 levels which means we're definitely getting enough oxygen. It just doesn't seem to "register" in the lungs as the normal feeling. A few years back when I started the breathing exercises, it was like things synced up again for a while and then the problem came back. It's manageable and tolerable now, but I can't help but wonder that there might be some sort of disconnect. Do you plan on seeing other specialists in the future? I did see a few specialists some years ago to have a bunch of tests done, all of which came back normal.