I am a long time HA sufferer who is currently freaking out about lung cancer. I am a runner and I cover about 20 miles per week. My runs seem fine and I don’t seem to be having any troubles during the run. BUT, I feel short of breath when I walk up a flight of stairs. I know this is anxiety, I really do, but part of my brain is screaming that I need to go to the dr. It is like I have forgotten how to breath and I need to force myself to do it. Anyone else have something like this?[/font]