This tooth is in the upper back area of the jaw. It first had a crown installed many years ago and more recently had root canal . On three separate occasions now , when eating , I had a very sharp pain in that tooth . When not eating it is fine and doesn't hurt and doesn't always hurt even when eating. What could be causing this ? Is it safe to go to the dentist with this problem now with Covid 19 ? I did go for a check up and cleaning not too long ago but this started happening afterwards. Can I wait till after Covid-19 with this ? Does the risk outweigh the benefit of going now ?