Upper abdomen and back pain

I need some advise from someone out there about pain in upper abdomen for 3 months and now for a week now I have been having severe middle  and lower back pain.  I have had every test available (EDG, Colonoscopy, Ct scan, MRI, ultrasound, Bloodwork and Hida Scan) All test were normal except the Hida Scan came back as only 7% so my GI removed my gallbladder.  I had my laperscopic Gallbladder surgery 6 weeks ago and I am still having pain in upper abdomen.  and now it is causing my middle and lower back to kill me also.  I cannot figure  out how every test comes back normal and I can be in Constant pain.  I know it is not irritable bowel since it is noot relieved by a bm and it hurts me constantly and now causing my back to hurt really bad too.  If there is anyone out there that has had this problem or can shed some light on my situation I would  greatly  apprreciate you advise.