I recently had a crown come out and had to go to the dentist to have it put back on. The dentist took an x-ray and told me I had some infection in that tooth and I'd need a root canal. I was started on antibiotics yesterday and a few hours after seeing the dentist my tooth started hurting. It's now hurting so bad I can't stand it. I've tried everything to relive the pain and nothing has worked. My question is about the abscess though... it seems to be getting worse. There is now a lump on my gums that is VERY sore to the touch. Is this normal even with taking antibiotics?