Have you considered maybe it is your gallbladder? Your symptoms sound exactly like this. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1121646/ Biliary colic and gallstones resemble the symptoms you mention. Same place, same pattern of pain/discomfort. Here's another article with some ideas about what to do. https://www.medicalnewstoday.com/articles/320442 Basically, cut down on calories, fat, carbs. Sigh (no fun!).