hi, well i had this weird thing last Monday where i was sitting in class doing nothing, and all of a sudden my heart started to race. i freaked out and went to the nurse, who calmed me down after about 40 min. i went to the doc later that day and had an ekg and bloodwork done, both good, but i was told i would soon be doing a 30 day event monitor. So basically what my doc said was my heart sounded ok when she listened to it, except for a little speed up that i didn't feel when i did the part where you squat and stand back up, but that it was still pretty normal for most people. she just wanted to make sure i didn't have a tachycardia (can't remember exactly what type she said, but she said something about the top part of the heart becoming too sensitive). So it could be that, or it could be nothing. all i know is im freaking out over it. Everyday when i go to school i get so anxious about it happening again, and up until today, exactly one week from the first one, it was okay. but today in the same exact class on the same exact day as last time, my heart raced again. it's actually almost as if it never calmed back down from the walk down the stairs to class and then sped up. i tried to keep calm, it was like last time, racing heart out of nowhere, shaking as if cold, extreme fear. but this time i felt my heart start palpitating a bit, which really freaked me out. now, i am scared to exercise. i love going outside and doing hula hooping everyday but now this has me worried. so, anyone out there with this tachycardia? does it sound like tachycardia, or just anxiety? i wasn't even anxious the first time. should i be concerned? is it dangerous? i really want to continue exercising, should i? i sometimes have random palpiations where it feels like my heart beats really hard all of a sudden. those aren't bad, are they? someone please put my mind at ease!