I passed out yesterdayy?

I passed out about 3 years ago in the hspital while visitng my frined. They did testes and said i have vasa vago or something like that. YEsterday, i passed out when i had extreme all of a sudden panic. I also might htink it was cuse i wasnt hydrated. After i woke up, i was dizzy but like an horu later i was fine. Today, i was fien this morning. But now i am feeling dizzy. Btw, i have a lot of anxity. (i do take 100 mg of zoloft per day). Is thsi normal? shjould i go to the doc. even though they alraeady said 3 years ago i have this? Any comments? Thankss