without the ability to examine you first hand i would have no way of determing the reason for your symptoms but i can tell you that there are many arteries in the abdominal cavity that "pulsates" as well as intestinal parestalsis (the rhythmic movement of the colon. not unlike a snake moving). if your doctor cannot find a reason consider seeing a different medical provider for a "second opinion" or ask for an abdominal ultrasound.
pulsing in stomach but not pregnant. i keep getting this strange pulsing in my stomach around my belly button area. i am on birth control and have taken 3 home pregnancy tests that came out negative and also went to the doctor who confirmed i am not pregnant. however it feels like quickening during pregnancy it's very strong and i can sometimes actually see the area moving outward. it doesn't travel around my stomach but stays in one place.