Definitely have your dentist look at it. May need a new temporary made. The current one was probably compromised during the root canal procedure which is very common.
Do not wait for your next visit. See your dentist immediately to see if the bite is high so it can be adjusted. If that is the case, have it adjusted and then chew on the opposite side for a while to allow the area to calm down. May still need a root canal in the future.
Sounds like it might be painful. Go to a local dentist to have it looked at and take an X-ray.
Should not be an issue. Go back to your dentist to discuss your concern. Probably can just be polished out.
Sometimes it is possible to reshape the restoration just a little. You should definitely go back to your dentist and discuss your issue so it can be resolved. It may just need to be polished.
