I had 3 cavities filled on February 22nd and have had increasing dental pain for the last 2 weeks. The pain ranges from a dull ache to throbbing pain. I don't have the pain every day, but most days. I have been taking tylenol or advil, which takes the pain away completely, but I can't continue to take it everyday. One of the cavities was very deep and the dentist told me I'd have sensitivity to cold and heat but it would eventually go away. I think I should have had a root canal. What could be causing this pain?