K.L.
If the hyda scan comes back negative, I would most definately have an EGD done to check for ulcers in the stomach and the upper part of small intestines. And a CT scan of the abdomen if you haven't already. Have you physician refer you to a GI doctor. I had that exact same pain you are describing, went through all the usual gallbladder tests, and in the end, it turned out to be an ulcer in the upper part of the small intestines. That's why all the pain was on the right side. Just a suggestion. I wish you the best of luck!!!