I have pulsating on left side of abdomen.?

Hello everyone. My name is Peter, I'm 23 years old. Recently I've been diagnosed with aortic insufficiency due to a leaky heart valve. My cardiologist told me it's really nothing to worry about since I'm young and fairly asymptomatic. Recently though I've noticed that my stomach pulsates, I can feel it when I press down firmly quite strong, and I can see it also. I know this can be normal because I'm very thin (I'm around 60 kg). I've also had some sporadic stomach pains all over and been passing lots of gasses recently so a combination of all that got me worried. I've mentioned the pulsating to my doctor but he didn't think nothing about it, didn't even bother to check it out, he just said you're thin its normal. I usually have lower than normal blood pressure, around 100/60, and these past few weeks have been stressful for me, and I'm really embaressed to go to my doctor again in fear he might just think I'm a hypochondriac since I've been having visits almost twice a week for a month now.