i am experiencing mid to lower abdominal pain, centre, not to one side. - constant, feels like I m bloated, crampy, slight nausea. I m 60 years old, post-menopausal, no bleeding, not tender to touch, no fever. Maybe related to food - I ve eaten a bag of chips two days in row and am unaccustomed to doing so. Enough pain to keep me awake at night, has been continuing since last evening.