Hi I am having a strange problem. 10 days before I was in very tense situation and that i had to take a full breath every 2-3 minutes. Now that problem is gone but I am intended to take a full breath (but not so frequently). During morning time i feel better i mean i can take a full breath lungs completely filled with air. But during evening times i am unable to breath fully. I feel that I am able to take only a half-breath when I try to inhale completely and I feel as if i am short of breath. I am not knowing if this is really a probelm or just my feeling. I already had been to three doctors my chest x-ray,ECG and pulse (oxygen intake) are normal and they said there is no problem. Please advice me. I have this feeling sometimes during morning as well. I don't smoke,have no allergies or chest pain. Eagerly waiting for your answer.

Thanks,
Raghav