This hasn't happened to me to the extent that it did you, but it makes me unable to move my jaw. I just clench it, and can't seem to unclench it. It's the strangest feeling, and I can't imagine how you felt. It must have been so scary.
I hope someone else comes along that can relate to this more, but in the meantime, definitely let your doctor know about what happened.
Migraines really stink. :(