Hi Stephanie,
It sounds to me like you have made your jaw click. I've done this myself and it can really hurt, and also startup a headache. If carries on for too long see your dentist.

As for teeth grinding, you need a biteguard* made, as grinding can do quite bit of damage to teeth. Again you will need to see your dentist about this.

While you are there, they could also look into if your wisdom teeth are pushing your other teeth forward, which possibility might explain why your bite it might not feel right.

*In a former life i was a Dental Technician and used to make these amongst other things.