I have the exact same thing. I started getting palpatations just out of the blue. There was nothing wrong with me. It wasn't a particularly stressful point in my life. I just started noticing that my heart would flutter/stop every once-in-a-while and it was scaring the crap out of me. So, I went to the doctor, got an EKG done, and a holter-monitor put on for 36 hours. It was so not worth it. It's just one of those things that you'll probably have to deal with for the rest of your life. It does probably mean heart problems in the future--I've been told that I have high blood pressure
too. Palpatations are an electrical problem, by the way. Chances are that you and I will end up with pace-makers when we are older. But in the meantime, there's no time like now to make good choices that will keep our hearts healthy. Take walks, eat right, stay un-stressed. You should be just fine.