For about 6 months now, I have been having a gnawing/jabbing pain under my left breast. It is localized to one specific spot under my ribs. Then, about 2 months ago, I noticed that my left side of my rib cage was extended about an inch further than my right. It seems swollen but I can't figure out the reason for it. I tried to pay attention to how I felt after I ate certain things or even after eating and it didn't seem to make a difference. One thing that worries me is that I used to be bulimic and I am afraid this has something to do with it.