I had a root canal done on my upper left molar 2 years ago , I don t have pain but it is just always irritated , when I push on it it is tender , the irritation radiates behind my ear , when I push behind my ear I feel it right in that tooth , I visited my dentist twice , he took xray and said there might be a mild infection in my jawbone and prescribed an antibiotic and said it should clear up , its been a year since and it has never cleared up ,he doesn t know what it is or he doesn t believe me , any thoughts on this ?