Breathing short...?

hey my name's Andrea! i was just wondering what this is: sometimes i breathe so short and all of a sudden i get this really bad pain in my lungs, i can't breathe in or out because it hurts so bad - but to get rid of the pain i have to keep inhaling or exhaling until i get this feeling like a bubble is popping inside my lung! it hurts SO BAD...i have always gotten it, ever since i was little. anyone have any idea as to what this is?? i'm clueless! =)