Not sure how much help I will be, but I too have constant belching after eating. I find the slower I eat, as well as the more natural and less processed foods I eat, improve my belching. I had an endoscopy last year and everything was fine, but I was told it's GERD. I get bloated as well after eating. This has been the primary reason I've started to eat primal. I find that doctors don't know very much about this stuff, and just prescribe PPIs, which is very harmful and does more damage than good in most people.
As far as the gallbladder issues, I did a lot of reading in the past year on this digestive stuff and many people that were experiencing belching and other digestive issues had their gallbladder removed as it was thought to be the culprit. Most of those people found that it didn't help and their symptoms continued after it was removed.
Have you ever tried HCL? It may help with digestion a little. Maybe even some digestive enzymes. If you still have pain, I would definitely recommend going to the doctor. Just be careful if they try to give you PPIs.
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