I got punched in the mouth and the inside of my gum got cut open by my teeth and the cut has turned white and has a bad odor. will bactrim (sulfamethoxazole and trimethoprim) work 4 this?

See a Dr: Bactrim (sulfamethoxazole and trimethoprim) is usually for UTIs and respiratory infections. Also, if you have it leftover from a prior condition it's not a great idea to have failed to finish the entire Rx. That's asking for resistant bacteria! See a Dr to get the proper Tx and follow instructions. This is your only body - take care of it! You're worth it.