I have had tooth ache for 2 weeks. Started as a pressure feeling one night in my up right hand side teeth. Few days later the pain was in my front tooth that has a root canal from 17 years ago. Dental x rays show nothing. Pain is only relieved when eating and chewing then pain returns. The feeling is of intense pressure in the one tooth the front right one. Don’t have a cold but sometimes feel a blocked nostril on the right side. Any ideas we are at a loss.