I would love to know what I did to my jaw...

The left side of my jaw has been really stiff for, like, the last three or four days. It’s not hard to talk, but if I open wide for a large bite of pizza or a wheat burger, it hurts! I mean it really hurts. If I don’t move my jaw slowly, I’ll whence in pain because of it! And even if I do go slow, it still hurts!

I have been in pain almost every time I try to eat something for the last three or four days! And it’s not getting any better! This is driving me nuts!

And I can’t help but test my jaw several times while typing this and it’s just hurting over and over again! What’s wrong with me?!