First time experiencing palpitations
I am 17 and when I was at school today, just sitting not doing anything, I suddenly became dizzy and started feeling throbbing in my throat. I stood up and checked my pulse as I could tell my heart was beating fast because of the vigorous throbbing. I didn't measure my pulse but I could tell it was very high. I immediately called my dad (doctor) and told him about this. He told what I am experiencing is palpitations and he asked me to massage my carotid artery next to my adams apple gently. It didn't really work. I left my school and I was still palpitating. My dad also asked me to eat something or drink something sugary so I did that. On the train back home around 30 minutes after it started, the palpitations came to a stop. Once I reached home my parents took me to the hospital where they took ECG and echo tests. My resting heart rate was 120 at that time, Which was far less from what I experienced during palpitations. The ecg came normal but echo said that I have a insignificantly dilated RA and that was nothing to worry about. They said they need to take echo when I'm having the episode to really see what's happening. They also said I might need to get a holter and a smart watch. They also said I have tachycardia. I have never had trouble with heart before but I also have insomnia which I read some posts about here. This next year is a very crucial year for me and I was really not expecting such a problem. Has anyone else experienced this at such a young age or has had a similar experience I request you to share it with me. And if there is something I need to be worried about I would like to know about it.