Ask your doc to run an ultrasound and HIDA scan with CCK injection to check your gallbladder.
Thanks CalGal, but I had both and they came up negative
Have you tried following a low fat diet - and I mean really low fat with no cheating - to see if it makes a difference? The tests aren't perfect for gallbladder issues, unfortunately.
Also, if you're female and wearing an underwire bra, as screwy as it sounds, try wearing one without the underwire and see if it makes a difference especially if you're developing a 'concavity' under the breasts that some women get. That change in bone structure and the pressure can press on nerves of the celiac plexus and cause some organ pain.