How long have you suffered from this?
Mix organic turmeric powder with raw coconut oil on the stove until it is hot enough. Let it infuse, cool and then when it is warm just slosh it around in your mouth twice a day for some days and see how you feel. Its called oil pulling. The turmeric is for the pain and inflammation. The coconut oil is for the cleansing, healing and has other benefits. It will absorb and help you. You can also add thyme oil for added effects, which I recommend if you can get. No big deal if you cannot. One drop is enough.
Please let me know how you feel in a few days. Stay away from sugary foods and drinks.
You may not even need to go to the dentist after days of doing this. All they will do is give you antibiotics. The turmeric and coconut oil have those same effects. You can ingest them too for additional effects. I use to eat two tablespoons of coconut oil a day to heal some problems I had.