I've had that before. (or something similar) when you bite down, it feels like your teeth don't align correctly, and it hurts your jaw like kinda behind your ears?
Have you had this before?
When I get it, it's either caused by my grinding my teeth at night, or if I sleep with my head in a weird position.
Either way, it usually goes away in a few days. I know it's uncomfortable.
i don't think there is anything you can really do about it. When I get it, I usually have the urge to try to stretch it around a bit... But that usually aggravates it, so I don't recommend doing that too much.
You may want to look into a night guard to wear while your sleeping, if you grind your teeth.
I hope the discomfort doesn't last long.
~qriosity~