Feel like my stomach gets upset differ times each day. feels crampy in pit of stomach like when taking laxative & this usually produces bm. causes?

Crampy stomach: Would follow up with gastroenterologist. May be irritable, food intolerances or inflammatory bowel ( any blood in stool? ). Could try elimination diet i.e. 1 week no lactose products ( dairy) , 1 week no gluten/ breads/ pasta, cakes, 1 week no soy products to see if related . Could do food allergy testing and test for bugs like giardia, amebiasis.May also be gallbladder or h pylori. f/u /w/ GI