I had a STD I got my shot and I'm takin pills but I slipped up and had sex with him again unprotected what should I do go back to the doctors?

SEXwith same patner. That was the wrong thing to do unless he was treated as well and there was enough time for cure.From your treatment of a shot and pills it seems you were treated for gonorrhea and chlamydia.If your partner was not treated then you need to have repeat of the therapy.If you are going to have sex again with the same partner, you should make sure he/she is screened and treated for the std as well.
Unprotected sex. Yes, if your partner was not treated.