hi my name is ayman before 2 years my problem started shortness of breathing (its like there is no enugh air coming and its feel like if i do not breath forsing my sef to do that i will die )without any activity its caming sudden for 30min to 1 hour , first time came to me when i was in the airplan and thats scared me really. i did one chest x-ray and this is the result(Prominent broncho-vascular markings seen in the lung fields) otherwise normal.. now im feeling better , but as i tod u before its coming suddenly for short time , i experiase that 4 time , but im active running from time to time , going to gym wihtout feeling any thing .... im smoker