I have serious chest pain, my hearts pounding through my chest making it feel hard to breathe, could this be from a tooth infection?

You know for sure that a tooth is infected? Have you been to a dentist for this? If I were you, I would get myself to the ER asap. Get someone to drive you or call an ambulance.

If the tooth has been infected for some time, and you know it, yes the infection can enter your blood stream and cause serious damage. So yes, get yourself to a hospital immediately.