I had a crown and 4 fillings done and have had extreme dental pain ever since. What should I do? The dentist was out of state.

You need to go to a DDS and have your work check out. It could be a few things. Maybe the crown or one of the fillings are too high. (this is a very easy fix) On the other end of the extreme, you might need a root canal on a tooth. But you won't know unless you go to a DDS and it is checked out. (you might need a few x-rays taken)
Good Luck
RM