Well first of all I am a healthy girl. I am overweight but nothing serious. I have no high cholesterol and stuff like that. I do have family that have heart problems and murmers and things like that. But lately I have been feeling like a fluttering feeling on my chest. I know it has something to do with my heart, it feels like my heart just opens and stays open for like 10 seconds, while this is happening I get short breath and I have to stop what I am doing. My school nurse told me it can be anxiety, but I really dont know what it can be. My mom also told me that it can be too much cafeine intake or sugar, but I dont really drink coffee's and things like that. So what do you think it can be?

-Lilly