My heart hurts

I am having chest pains.

OK, not that kind of chest pains. It is on the opposite side than my heart and it feels like a bruise or muscle thing.

I am sure it is a bruise on my ribs or a tweak of my fierce pecs, but here are the problems:

•  I can't recall doing anything to it. That doesn't mean I didn't hurt myself. I use my arms so much. And I am constantly twisting and slipping and stretching.
• I can't give my arm time off to get better either. I need them to do everything I do.

And that makes my heart hurt.