Hello and thank you for using HCM.I carefully read your question and I understand your concern.
I will try to explain you something and give you my opinion.
You should know that typical heart pains have some characteristics.They usaly are retro-sternal pains likesquizzing,tightness or heaviness. They may irradiate to both arms ,neck and jaw. They last from 5 to 20 minutes.A
heart attack is usaly more dramatic, whith sever long
chest pain associated with
nausea,
vomiting ect.
Heart pains are not related whith outside factors,meaning that you cannot have a heart attack if you just hurt your chest.
If your electrocardiogram is normal,this is a very good think.
You dont mention your age but if I was your treating doctor to exclude any heart problem I would recommend some examination like a cardiac echo,a full blood analyze,cardiac enzymes and a strees test if it is posible.
Aftet this you can be quite shure if it is something to worry about or is just a muscular or sceletic problem. Knowing the reason helps to understand how to treat it.
Hope I was helpfull.
Best regards,Dr.Ervina.