Breathing difficulty while running consulted various doctors but still have a problem?

Breathing difficulty while running ,climbing etc. consulted various doctors (Heart, Respiratory Specialist, Dentist, ENT) and conducted various tests
Tests Performed.
PFT (Pulmonary function tests)
CHEST PA
CHG (HB TC DC, PLT ETC)
E.C.G
X-Ray CHEST Cavity is clear
No symptoms of TB
2D Echo
Nasal cavity is fine as well.
All are nomal but i still have the problem with no solution at hand.

Age:34
Male
Medications: None