I would ask your OB. There are things that aren't considered safe in pregnancy to use on your skin. I found if I only wear make up on days I'm going out it helps a lot. I found the make up is what is causing the breakouts while I'm pregnant.
Ugh I have it all over my back and arms I've never seen anything like it. I use Neutrogena oil free face wash with acne free benzoid spot cream on my face but my back is a lost cause. I combine sallycilic acid treatments with benzoid so it kills a ton. When I run out I use hand sanitizer to kill the bacteria