I can recommend digestive enzyme supplements containing proteases (enzymes that digest protein). Proteases help reduce inflammation, clean out debris and infection, and stimulate healing.
My mother had severe bile gastritis pain and she no longer suffers pain after around a year of taking digestive enzyme supplements. If she stops taking these supplements the pain will return due to bile leaking into the stomach. Also consider probiotic supplements to see if that helps your gut issues.
Maybe Celiac or gallbladder problems.