Hi there,
I'm 22 y.o male, working in the office(sitting in front of the computer all day long), experiencing shortness of breath since I was 18. I had my nose broken twice, when I was a kid. Been to doctors several times, different clinics, in different countries, did lots of tests, blood, x-ray, etc. Doctors say everything is fine, try working out, don't smoke. I Quit smoking 2 years ago, been visiting gym for 6 months, didn't help. Could be COPD, but I don't have any cough.