I broke part of a molar near the gum line eating a almond and went to the dentist the next day. I wanted the dentist to remove the tooth (I'm 62) but he said there was no fracture and convinced me to try to save it. They put a temporary crown on then, 2 weeks later a permanent crown but not sealed permanently because I was still in discomfort. They suggested a root canal with an endodontist which I had done. Now almost 4 weeks later my tooth is very sensitive to just touching it with my finger, also my jaw is still sore. I've taken inflammatory drugs plus antibiotics. Both dentists say the xrays show nothing wrong. There is no infection either. What is causing the pain? Why won't it heal?