What Causes Abdominal Pain And Chest Pressure While Having Hiatal Hernia?

I have upper abdominal pain. I have had an endoscopy and I have had my esophagus stretched. I also have a small hiatal hernia and some inflammation in my stomach. I also do not have my gallbladder. They think it is acid maybe bile reflux ( because of the removal of my gallbladder). I ve taken sulcrafate, ursidiol, and reglan at different times. They really didn t help. I was on Prilosec, but got sick taking it. Then I took Pepcid. That helped somewhat but still had problems. When my stomach hurts, I usually take Pepto-Bismol. My gastroenterologist said I don t need to be on anything anymore. Just take medicine when I have flare ups. I wonder if it is the LES not opening and closing properly. I have difficulty burping or if I start burping, it seems like it is little burps and it just won t stop. It feels like a clogged drain, and sometimes it feels like my chest has so much pressure. I usually have problems at least once a week. I am sick of it, but my doctor doesn t seem that concerned since all the tests that have been done have been normal. My bowel movements for the most part are normal except when I have flare ups, they start out okay but the end of it may be narrowed or it may all be narrow. I just would like some advice on what I should do. Thank you.