I woke up this morning and had the worst pain in the right side of my chest. It really hurts the worst when i breathe in deeply, doesnt hurt with short breaths. I had a friend come over this weekend and smoked alot more cigarettes than normal. Its only started this morning so its been goin on for about ten hours so far. I dont feel sick, i'm not coughing, its just simply every time i breathe in deeply. I have not smoked any more since last night and i'm obviously not going to while i'm having breathing problems. My question is: Is this something that may just pass? or should I go get this checked ASAP? Also, I painted the garage floor with an xylene based paint three days ago on friday, but think cigs are more the cause, would an xylene based paint taken three days to affect me, or is it just the smoking? thank you, aaron.