I want to have sex but I just had a cervical biopsy is this bad? What will happen if I do have sex within a couple of days after this procedure?

Wait 1 week. We normally recommend women refrain from the use of tampons and from intercourse for 1 week following a cervical biopsy. Infection and bleeding are potential complications if these instructions aren't followed.
Ill advised. If your partner wore a condom it would reduce the chances of transmission of infection, but even the condom can carry organisms onto a fresh wound where they can cause infection. The trauma to the area by repetitive hammering of the penis onto the cervix can also induce bleeding. Would wait about a week.