There are so many things that can cause tachycardia, it’s important to get this checked out
I was in the ER in my twenties and it was caused by hyperthyroidism. I am NOT saying this is the same in your case but my experience. The thing is, if I had the same thing happen today, the risk because of my age, the odds are high for having a heart attack. I almost did and I was in my twenties.
Did you have tachycardia when wearing the monitor or were you wearing it for a different reason.
Whatever the cause, it needs to be throughly investigated.
Good luck!
I would get this checked out even if your parents disapprove. It’s your body. Do you live with your parents and/or have health insurance? It’s easier said than done to cut those strings. Been there done that!