So, I am currently 3 months post-op from a lap appendectomy. Since then, I began feeling pain in the same area. The surgeon told me it was normal. About 6 weeks ago the pain began to get worse and it was migrating to my back, and i would feel pain in my right shoulder. I went to my pcp, who came to the same conclusion I did, that my gallbladder could be my issue. I had an ultrasound done, but it revealed nothing but Murphy s sign when they scanned my gallbladder. He has me doing a HIDA test tomorrow but I am not sure what exactly they are looking for now and he is conveniently on vacation, could you help me understand what they are expecting to find in this test?