I Had My Gallbladder Removed In April Of 2015. In

I had my gallbladder removed in April of 2015. In August I had an attack that felt just like a gallbladder attack but no gallbladder. The pain stayed for about 7 weeks, was worse with certain foods. The pain radiated from my mid upper abdomen to my back and sometimes on my left side. I had two endoscopic scopes done and they couldn't see anything. I then started to feel better for about a month and a half and on Nov,weber 29th I had another attack. This time I have tons of belching, the pain in more severe and is daily. It isn't even set off by foods, it is just always there. My providers have me on 40mg of Pantaprazole daily, however I have been on it for 7 weeks now and am getting worse. I guess I should mention that I also had salmonella poisoning back in April of 2016 from a trip to the Dominican. My stools have been bright yellow and I noticed this evening they have now turned green. I have only had bananas, apple sauce and baked chicken and rice to eat the last few days. Nothing of green colour. I am leaning toward either gastritis, h pylori or post cholestectomy syndrome. Any thoughts?