I am so sorry you are struggling like this. I am wondering with your gastrectomy if you know if they removed or bypassed your pyloric sphincter. I just took a nutrition class and I learned that the gastrectomy surgeries that do that and gastrectomy surgeries that create blind loops are the most challenging to manage. Those procedure types can be quite problematic as far as absorption of nutrients as well in the case of a blind loop one gets overgrowth of bacteria and fungus which causes issues. As well you have nutrients dumping straight into the part of the small intestine that was not designed to handle that. My teacher who is a registered dietitian did have some strategies for managing the situation. If you haven’t already seen a registered dietitian for help with this that might be super helpful. She said the surgeons do these procedures and then just move on to the next patient. No accountability at all for chronic issues the patients are left dealing with the feast of their lives. Registered dietitians also have strategies for managing chronic pancreatitis. So some kind of plan that works both those angles while you get this all sorted I am thinking could help you feel better regardless the ultimate cause that is determined or even if the cause is a combination of both conditions. My teacher said it is super rare that people only have one system in their body that is experiencing dysfunction. That we learn these diseases one at a time in isolation and then when one sees an actual patient they almost are dealing with having multiple conditions.