If you had chest pain, nausea, light-headedness, or any of those, I would say it is heart related. But if you don't have any of those, it's probably not.
It could be a lot of things. It sounds like a nerve issue, like you may have pinched a nerve or something. I'm guessing the numbness is related. If it lasts more than a week, I would go to a doctor. Usually, if these things are caught early, it is more likely that you can have a simple treatment for it. If you wait too long, you could do some damage.
