I am sooo sorry this happened to you.
I just want to tell you a secret. I know I can't give medical advice but let me share something with you.
When I was 15 I started having problems with my HR going up to 180-200s. I went to my PCP who accused me of drug abuse (until my drug screen came back negative), to having anxiety, then to not wanting to go to school.
One night I was getting ready to go out to eat and it happened, my mom who was my biggest supporter and knew I was not faking or doing this to myself took me to the ER. I was in SVT. I received Adenosine and was sent to a EP doc. I had ablation the summer before I turned 16. That was the best thing that ever happened to me.
I did have a problem about a year ago with my HR running around 120. I was put on Toprol XL until this past September and went on a diet. (I got pregnant in July so I quit the diet), but I am now off the Toprol XL and feel much better.
All I can tell you is to please see a doctor you can trust, make the necessary lifestyle changes, and follow what you feel is best. Please don't be embrassed. This is not something you can help.
If you have any questions, feel free to ask me or PM me. I will keep you in my thoughts.