I am 40, male, non-smoker and swim laps a few times week for exercise. I have had HA for many years. So I have been having lung cancer fears. I just can't shake the fear despite some lovely members of this board trying to help me out of this. I have been having upper back pain, especially near or under the left shoulder blade and pain in my fingers and toes. Now I am fearing that I am having shortness of breath and blue finger nails. I went for a swim last night and didn't really but maybe did feel short of breath. I can't tell if my fingers look blue. Does anyone know any self tests or anything like that to tell if I am having lung problems? Anyway, I am feeling scared and my having chest pains and maybe causing myself to hyperventilate. Please help me find the end of this hellish journey.