Several months ago I felt pain (it wasn't really strong) in my chest bones. My chest bones usually do stick out a little (something me and my sister got from our dad) but now I think they stick out even more than usual. My main concern is this pain I have, I can't really locate it, sometimes it's in my bones above breats, sometimes it's somewhere between bones. I googled it (I know, mistake) and of course it's a sign of lung cancer. I went to my doctor but she said it was probably nothing and sent me home. I am surely not developing anymore (I'm 21), but it's really starting to bother me, even when I have seat belt on or zipped up jacket. I am a bit afraid because I used to smoke, but I cut down on it. What could it be? Could it be connected to GERB (because I do have some issues with that, but as far as I know, it's nothing serious)? I am not coughing or having any breathing difficuties (shortness of breath and such).
Thank you in advance!