I went to the dentist a week ago, had exrays done, no infections. I have been bothered by a 2nd molar that needs root canal therapy, along with a bicuspid that needs the same. Now, the bicuspid has been bothersome for 3 days. Not a painful hurt but just sore. It feels like a lot of pressure, almost like its trying to force its way out. I looked at it with a mirror and it looks like a bruise is forming around the gum line. Its sore to the touch and to bite on it. Its throbbing and feels like a screwdriver has been shoved in the gum if I bite down. What could be going on? I am currently taking Bactrim for a UTI, for 3 days as well as ibuprofen around the clock. Neither are helping.