For about a week I've had bruise-like pain in my right upper abdomen, kind of where my rib cage is located. However I don't have a bruise and I suffered no such injury in that area. It hurt to walk and bend over and literally felt like a giant bruise. Today it got worse as the pain spread to the left upper side of my abdomen and down to my right lower abdomen as well. It now hurts to breathe and along with bruise like pain, it feels like extremely sharp constant cramping.im also experiencing Less extreme pain in parts of my back and the left side of my chest. At this point I struggle to move. What could this be, if anything ? If it helps I'm 17, a girl, 5'7 and weigh 130 lbs.