Hi, I have a hard ball in my stomach that I can feel my heartbeat in. I can move this ball around a little, but it is normally near my belly button. It is uncomfortable to push on but, not painful. My periods have not been regular but, no other symptoms. I am 30, never smoked and not high BP. I have lost 30 pounds in the past few months and wonder if this is just something I can feel now that I am thinner or if it is Abdominal Aortic Aneurysm? I have used Phentermine for weight loss in the past, no other prescriptions or health issues. Thank you!