Before trying anything else I would try urine for 15 mins in the mouth twice a day if you can or more. I would also use the Sota magnetic pulser about 50 times around the jaws and mouth including the ear and you can do this while holding the urine.
If there was no change after 24 hrs my guess is you need to do something else. The only thing I can think of is silver water held for 5-10 minutes in the mouth a couple or more times a day. If you did all three you should see a result within 24 hrs of beginning. None of those things will do any harm, that is important. I do not like the prospect of having the dentist fix it after that.
I favor urine as the best cure, while I think silver water is the fastest way to kill any germs. People who write books on urine therapy also believe strongly in urine soaked bandages, (but they are messy and how do you go to work)?