I was wondering what do i do for infected tooth?

Have it treated: You will need to call a dentist to have the tooth evaluated. If it is infected, then it will need either root canal therapy or an extraction.

Infected tooth: See a dentist for an infected tooth. Don't try to treat it yourself. You need a dentist.

Infected teeth: Infected teeth require proper antibiotic regimen and removal of cause of infection by qualified dentist. Set up an appointment ASAP!

See your dentist: You need definitive treatment to get rid of the infection. Antibiotics may temporize the infection, but need to get the underling problem taken care of.