For some background info, i'm 19 years old, but my family has a history of heart murmurs.

Over the past few weeks, i've noticed a very quick violent pulsing below my heart. When this is happening, my heart is pulsing at a regular pace. However because of its proximity to my heart, I want to make sure its not my aortic artery. If you were to draw a line down the middle of my abdomen, this would be to the left slightly. Between the bottom of my left lung and the center-region.

When it first occured two weeks ago, I felt the pulsing going off and on. Every 10-30 minutes it would pulse volently then stop. This continued for about an hour, before it stopped. I didn't have the pulsing again for weeks.

Recently it occured again. Today and yesterday its been pulsing again, except this time it hasn't stopped. I'll go 10-45 minutes without feeling anything, then suddenly i'll feel violent pulsing for about 10-60 seconds.

I went to the doctors office, and explained what I felt. The doctor there felt around my abdomen, and listened with a stephoscope. He concluded it was probably muscle spasms, but it doesn't feel like any muscle spasms i've ever got before. When the violent pulsing occurs I can see it on my chest.

Should I get another opinion? Or is a stephoscope more than enough to detect any sort of aortic aneurysms?