Two months ago, I had a canal on a back molar, which was performed by a regular dentist. Four days later, I began having extreme pain on the tooth where the was done. I cannot chew anything at all. For the past two months, I only ate food, which does not require chewing. The dentist does not have any ideas what is causing the pain. The and the tests he did turned out fine. I am already on the second round of antibiotics but there was no improvement at all. What should I do? Does anyone have any ideas about my situation? Thank you!