I believe that acne products where the active ingredient is sulfur are safe during pregnancy. I've used a sulfur soap for a couple years w/ pretty good results & I know there are a few masks & spot creams as well.
Carrie. Wifey to F, Mama to Baby Bear, Nugget, and Teeny.
ISO crotch-snapping footless playsuits, rompers, & pants in 3-6mo size.