i had chest and lunge type pains for yrs then about 4 1/2 yrs ago my chest hurt so bad couldnt breathe so i went home form work stayed home two days could only lay on one side finally coughed up some blood went to ER waited 4 hrs got told i had pnuemonia they did some xrays then ran in and said hold up need ekg blah bloah blah told me had good news and bad news and good news was no puenominia but bad news was a collapsed lunge
was supposed to be out in 18 hrs well 30 days later 2 surgeries and 5 tubes threw my left ribs i went home i used to smoke2-3 packs a day but havent smoked since (no smoking didnt cause it) figured i went all those days without why bother :D good luck hopefully it isnt nothing serious but goto doc and get checked out man