Hydrogen peroxide does not kill germs.
Listerine kills germs like a motherfucker, and it's a mild analgesic to boot.
If you have pain that cant be fixed with Listerene/ibuprofen, then run to your nearest dentist.
I have yet to run across a dentist that won't do a quick pull/uninsured just to get someone out of the shit...you will NOT get a script for vicoden et al, but you will get the painful tooth pulled....even if you shit your pants for a few days, then the pain goes away. They'll even give ya some antibiotics...the freebies they get.