From the chronic pain forum but get SVT

Hi everyone,
Hope you are having a good day!

I'm actually from the chronic pain forum but have many health problems, one being supra ventricular tachycardia, i know these are very common and i was diagnosed when i was 7, i used to only get them every few months and it was pretty much only if i did a handstand or was upside down, i had really bad attacks if i was upside down under pressure, for example we were snorkelling and i hadn't had one for a long time but swam downwards and it just went crazy!! it was the worst attack i have had and didn't stop for 2 hours, my pulse rate was about 260 i think and because it wasn't stopping with the normal things i would do to stop it i had to go to the hospital where it took them 20 minutes to stop it. But other than that i had never really had many bad ones, all only lasted a few minutes or so.

But recently as my abdominal pain has increased, i have been getting them pretty much every second day, they last only about 5 minutes but in the time i have them i feel really lightheaded and sick. There's nothing i do that can make them stop they just go away eventually. And nothing makes them come on, it is when i am doing anything, even just sitting. The doctor wasn't concerned before this started and just said it was normal, but now they are coming so often and are affecting me a fair bit (i faint alot from them) hes thinking it may have been mis diagnosed or be getting more serious. I had a holter monitor but of course that didn't show anything because i didn't get one while i had it! (thats the way it always has to work haha)

I'm a 15 year old her and play basketball twice a week, soccer twice a week and horseride 4 times a week, i run every second morning, so i would consider myself fairly fit. So it's not an issue of me just being unfit and my heart getting weaker.

If anyone has any idea what might be happening or just any thoughts about this PLEASE let me know,

Thankyou so much for reading,

Buttercup.