I'm pretty healthy, and have never been diagnosed with heart problems. But I've had MANY episodes where, out of nowhere, my heart will beat extremely fast, ranging from 10 seconds to 20 minutes. It feels sort of like a butterfly feeling in my chest, and I get really dizzy and weak. And it doesn't slow down gradually, rather it stops abruptly and returns to a normal beat and my chest hurts. Sometimes it'll only happen once every few months, and sometimes it'll happen up to 20 times in one day (while vacationing in Florida, it was occurring many times a day). Sometimes it happens while I'm very active, sometimes it happens when I'm just sitting on the couch watching TV. I don't have insurance or the money to see a doctor or a specialist, so I'm hoping it's harmless.
umm i'm 5'4, 115 lbs so it's not from being overweight.