Sounds almost like what s happening to me. Started off with abdominal discomfort for a few weeks, then suddenly I started getting back pain. I ve been to a couple doctors, and neither of them think it s anything serious. Thanks, docs...you don t have to live in this body! ;) Luckily I have a CT scan coming up...but I have to wait three weeks to get it. Could be anything from muscle strain, an ulcer, swollen spleen, kidney stone...there are lots of things it could be. You didn t state your age or many other details, so this is a generality based on my existing research.