The best relief for toothaches is just biting the bullet and going to the dentist.
If you don't have insurance, you might talk to them about a payment plan. Or go to a dentistry school, they always need people to practice on. I was a fool and waited years to get my wisdom teeth pulled! Thankfully my husband has some badass insurance ATM and I was able to get everything done, wisdom teeth extractions + 3 fillings and the insr. covered 80%!
Take care of your teeth, the pain is worse than labor(it was for me)!