okay so hi i'm 16 male I've been to my family doctor,cardiologist,massage therapist,acupuncturist,an the ER. This problem started in my first year of middle school i'm am now a junior at high school. everywhere i go to they just tell me that its anxiety and its really really annoying. The palpitations are horrible, i get different types of palpitations. i get a hit on the chest feeling i get a terrifying fluttering heart and i get skipped heart beats.the worst is fluttering because it actually last a couple seconds.okay so ive gotten many things done such as; ECG(x7),ultrasound(1),blood work(5),X ray(1).And somehow they cant find anything and its super scary when i get the palpitations i get a bit of an out of body feeling. ive had 911 called, that was when i had my first panic attack. Also like about 2 weeks ago i went mountain biking with my mom and we were about 1 hour away from the nearest road with no cellphone service and i got this palpitation that was quick an easy (my heart rate was elevated then about 30 secs later i had this fluttering hear palpitation which lasted about probably 1 min but it felt like it was forever. my heart rate got even faster than what it was previously i was so scared and kind of light headed . that has been the worst palpitation i've had in my life, so it has me thinking what it could be like i really rather die than have palpitations forever.(my cardiologists theory is that my heart arteries or veins idk what he said but he said they were kind of small and that with time they would grow and i would feel better but like he never confirmed that it was that. IM REALLY SCARED I HOPE YOU CAN HELP THIS IS SUPPER SCARY:.(