I had the exact same experience as you, im a 32 year old male, always thought i was pretty healthy etc.. I went to doc, the ECG and other tests seemed normal, then i started feeling dizzy so went for a echo...
That was yesterday..
Today im getting ready to go to Tampa to see the big time good cardio docs, they said i had fluid around my heart, there not sure why since i havent been sick or felt sick and they said i had a valve that was leaking.
Im completely and totally freaking out, im really scared, but its good to know someone else had very similiar experience and its not just me.