What could be my chest pain be?

I'm 16, female and 8.5 stone and lately I have been experiencing chest pain, it first happened about 3 weeks ago but it went away and today it came back and there was also a shooting pain down my arm, first thought Is a heart attack but could it really be that? It's like a pulsing pain that comes and goes, my parents are away for the week but when they come back I'll ask about it, but what could it be?
Updates
+1 y
8 stone is 119 pounds by the way, sorry for anyone who didn't understand
Updates
+1 y
So I was doing some research and does anyone think it could be anxiety symptoms? Cuz I heard that it's possible, and I am a very shy person and have experienced nausea for no reason in the past and that is a symptom aswell
What could be my chest pain be?
Post Opinion