Have you had an endoscopy or colonoscopy lately with an gastroenterologist? That’s where I would start. After my endoscopy (that I asked for) I still had food in my stomach and I had fasted over 20 hrs…. I had a gastric emptying test that lasted 4 hrs that confirmed I had gastroparesis. I had probably had it for years… Lots of bloating & pain after eating only small amounts….. Maybe this might not be your problem, but you need to start somewhere. .Prayers For Comfort and Solutions…..