My abdomen is pulsing like CRAZY in time with my heart beat. It's a really strong, hard "th-thump, th-thump". It's definitely my heart beat, not digestive.I just had an abdominal X-ray a few days ago; it didn't show anything besides bad gas and constipation. I don't think it's an aortic aneurysm or anything. I had some chest pain yesterday, but I often get that with upper-abdominal gas.Does anybody else get this?