Pain relief medication

I've had horrible tooth pain for two months. I now 8 months pregnant. I've gotten two root canals on the same tooth and no relief. I've been taking Tylenol and Percocet for two months straight. I can't get to a dr until tomorrow and I feel as if I'm going to drive my head into the wall!!!! My mom has hydrocoden apap 10-325. Is that the same as Percocet? Is it safe to take pregnant ?