Re: Stomach or gallbladder?
Yes, it could be your gallbladder. Common gallbladder symptoms include nausea, gas/belching, pain under the right ribs, pain in the back, pain in the left shoulder, diarrhea, stool that becomes pale in color, etc. The thing to remember is that everybody has slightly different symptoms.
The fact that you have pain after eating fatty foods is another sign of gallbladder disease. After you eat fatty foods, the intestines tell the gallbladder to contract and squeeze out bile to help break down and digest the fat.
The ultrasound is pretty good at showing stones and polyps in the gallbladder. It is not so good at detecting "sludge" which are sand sized microcrystals that can form in the gallbladder, these are the precursors that will eventually form larger stones. So if your gallbladder is trying to squeeze a bag of sharp sand grains, then you will get pain and not enough bile at the right time. The best test for gallbladder efficiency is the HIDA scan.
In my case the Nexium did also provide some relief.
Keep pushing, you will get answers.