Pain in Intestines TMI

Last few days or so, about two hours after I eat, I'll start feeling sharp, stabbing pains with feels to be in my intestines along with feeling nauseous. Sometimes I'll have a few bowel movements within 20 mins ranging from normal to tar-like and sometimes I'll just have the pain. It doesn't feel like constipation like I've had most of my pregnancy. I'm 34 weeks. Curious to what it may belt if anyone has had the same symptoms.