PLS I NEES URGENT HELP

I keep checking my heart rate on my watch and it's going from 80 to 100 too 110 and my left arm feels weird my dad said I'm not having a heart attack and won't take me to the hospital pls u need answers I can't calm down or do anything breathing hasn't worked nothing has.

Update: Thank you to everyone who replied it helped alot I went to bet got some sleep I feel better now. The only thing I have now is shortness of breath. I'll be sure to come back to this post for reassurance.