I also had extreme jaw and teeth pain.I couldnt' open my mouth without excrutiating pain. Because of it my teeth and jaw are out of whack. What i did was see my pdoc and he gave me anxiety meds to take. that helped stop the pain. Then i went to the dentist and he told me to get a mouth guard. I wear it nightly and it helps with the grinding of the teeth. It's been about two years and my mouth is much better. Took awhile to get it all straight again.
I didnt think to try any of the suggestions the others gave here. But if I knew about them I sure would have tried them.
I hope your pain goes away.