hello, i m an 18 year old girl. Recently, i ve had trouble taking in deep breaths along with constant short breaths throughout the day. Sometimes it hurts near the rib cage although thats to the right. I used to get these bursts of pain while taking a breath in, this has increased relatively. I also get extremely light headed when i move from positions, say i m lying down and i get up or i turn while lying down. At times, it tampers with my vision. As an infant i was diagnosed with something called mitral valve prolapse and i did have a bad case of wheezing as a child. My wheezing is minimal now. I also bruise easily. Another thing is, I smoke. Not alot, but i just though it may help knowing. i m sorry for all this information. I feel pretty weak,though i cant get myself checked.