i have been having bouts of severe stomach pain?
in my opinion this chronic pancreatitis you need ultrasonography + check blood’s amylase or lipase levels i suppose your doctor already did liver function blood test for gall bladder! also one last possibility is deudenal ulcer which require endoscopy yet it is unlikely because you found no h. pylori in stool (you did a stool test! )honestly i can see no other possibilities good luck