I had a root canal on a back tooth, number 25 I believe, the dentist did not fill the four root canal holes and he put a tempory crown on......it has been one year.  I have had crazy pain.....how long can you wait before having the holes filled.  It was a tempory cement used and a plastic tempory bridge on all three back teeth.
Thanks for your query, I have gone through your query. The pain after the root canal treatment can be because of the missed canal, or incompletely filled root canals. Nothing to be panic, consult an endodontist and get it retreated. You might have to get the bridge removed and get the tooth retreated. Meanwhile you can take a course of antibiotics like amoxicillin and metronidazole(if you are not allergic). I hope my answer will help you, take care.