I had a root canal on lower left molar this past Thursday. I have had several root canals and never had a problem. After novacain wore off I had intense pain unusual I thought but hope it was better in morning. Well that didn't happen I was in excruciating pain most of the night. Continued the next day. Endotonist started me on antibiotic zpac and steroid pac for 7 days. Pockets of huge bubbles of pus formed behind and around the tooth. They have since popped on their own and drained. Pain is better however I can't touch the tooth while eating or I go thru the roof. Puss pockets I think will continue to form. Not sure. Endodontic has not scheduled a follow up. Tells me to go to dentist for the permanent filling. ?? I'm confused as soon as I stop antibiotics won't the pain come back? Doesn't it need to be retreated and how soon?