I just recently for cavity filling done. My dentist initially said I may need root canal, but she did cavity filling instead. Last week when I went to get crown, I still had pain, then she said I may need root canal, but she went ahead with crown. Now after a week it still hurts, bite also needs to be adjusted and I may need to get a root canal. But my questions is do I need to pay her for root canal as well? I aleady paid her for cavity filling which did not work.