I Am 16 And In The Past Suffered From Really

I am 16 and in the past suffered from really bad anxiety. I am relatively healthy (if a little overweight, but I'm getting healthier), but for about two years now I experience these movements in my chest like my heart skipping a beat. This could happen five times in a day, or go weeks without happening. I've heard from a lot of people that this can be due to anxiety, but I'm pretty scared.