You can try tea tree oil. It has worked okay, not great, for me, but other pregnant women swear by it. You can get it at health/natural food stores. It is completely safe during pregnancy. Burt's Bees makes an (herbal) acne remedy stick that has been recommended to me, although I haven't used it.

If you feel comfortable using medications during pregnancy, you can ask your doctor for a prescription for Cleocin, which is supposed to be safe during pregnancy. Some doctors will also let you use over-the-counter products that contain benzoyl peroxide or salicylic acid, although benzoyl peroxide is a class C drug during pregnancy (which means it is not known whether it causes birth defects or not). Some people say ProActive works well during pregnancy.

hey shea, i know exactly how you feel, i broke out too while i was pregnant- it sucked. my derm advised against the cleocin, something about it being a vit A type thing, but yer s'posed to not use it while pregnant. i switched to topical eurythromycin. worked like crap! *lol* but better than nothing, i guess. have you tried the lemon juice thing? might work for you, although it also may give you heartburn, so be careful. congratulations! despite the acne, i looooved being pregnant, i was happy all the time, no clue why. my kid is 6 years old now, and gets more fun and cool and funny every day. totally unplanned, btw, but i'm loving it!