Hey guys. Being from Pakistan, which is both third world and old school, my parents usually always had some natural remedy for every common ailment I had.
So for teeth problems like aches, bacteria, or cavities that are developing, a great fix is cinnamon sticks. Not the candy
Try to get it from a farmers market or someplace like that because the packaged stuff is no good. So next, you take one stick and boil it in 3/4 a cup of water, stirring and smashing it the whole time, till you get all the oils out. Let the mixture cool just a little, then take all the liquid in your mouth and swish around (YES THIS BURNS LIKE ALL HELL, HANG IN THERE). Do this for a week before you go to bed, after you brush, and don't rinse your mouth too much or you lose all the oils.
This should fix ya up. Though if you still have pain, clove oil will definitely get rid of that. I don't like getting rid of pain though, it's like your ignoring your bodies messages.