Welcome, janthur!

That dental work must have been quite recent. It takes quite a while sometimes for the part of the mouth where work was done to "calm down." I've had quite a lot of dental work over the years and have noticed that to be true time and again.

Probably the remedy dentists are always recommending would help here as well--warm salt-water rinses from time to time during the day.

If there's an extraction, the dentist or oral surgeon often schedules a follow-up visit. You might want to do that if it hasn't already been done, just to make sure everything is healing up the way it should.