You might have your physician check on your gallbladder. Sometimes that can cause this type of pain, and gallbladder pain can radiate to the back.
I was *sure* it was my appendix, turned out to be my gallbladder. Pain was gone right after my GB surgery.
I have the same exact problem....I was also told it was IBS...I recently had a bone density scan done of my back and found i have osteo arthritus (degenerative joint disease)...this problam runs in my family so I was not supprised but was told for years that I was too young to have it..I am now 25 and have proved them wrong....the morral is, ask your dr. to do a bone density scan of your back and hips. I hope you don't have this but you have the same exact symptoms as I do...
lilred