Upper abd alway sticks out like im 7-8 mon pregnant after eating just a 1/2 sandwhich. I usually have one stool a day but not lg amt, & narrow?

Many considerations. First, I presume you might be slender to start with. In a very slender person, even eating a small amount can result in noticeable epigastric (upper abdomen) protrusion. But it is possible there is a mild small intestinal narrowing/obstruction. The narrow caliber stool suggests more of an issue with the colon. I would suggest a complete review of these symptoms with your doctor as soon as possible.