Hello,I am worried bc of my pulsating abdomen. I have noticed it going up and down while resting or lying on my tummy. I feel it pulsating faster and stronger after some mild exercise. And I always get dizzy when I stand up, even If I take my time and sit down for a while before standing up. It always goes dark and after a couple of seconds it goes back to normal. It has been going on for a while so now I m a bit worried.I am 21 yrs old, social smoker, no alcohol/drugs. I started working out recently, but the dizzines goes way back. Thanks,Izzy