A week today i was at the hospital and got diagnosed with SVT. I had a heart rate of 220bmp.. I've been really scared it's gonna come back and can't stop having panic attacks when i get home and relax from work at night.. I haven't slept more then 4 hours a night and I'm exhausted. What's wrong with me ? Did I some how destroy my nervous system that day. I also stoped drinking coffee and quit drinking alcohol. I was a pretty bad binge drinker and I'm sure that's what cause my SVT to begin with. But I'm a week sober and plan on staying this way. What's wrong and what should I do? I literally feel like I can't control myself at night..