Is it safe to use numbing cream (specifically emla (lidocaine and prilocaine) cream) down there before waxing when pregnant?

Depend how much: it is really depend how much and what is the concentration to determined how much the body absorbed the medication and is that will present danger to the baby or not my advice ask and check with your GYN small amount should not be a problem

Pregnancy and medici: EMLA (lidocaine and prilocaine) is Lidocaine and Prilocaine. They are a category "B" for Pregnancy. So they are safe