Use an ordinary razor, and just go very slow and very gentle. Pull the skin to make it tight, that helps a lot.

When shaving,instead of soap or shaving cream, use conditioner......you won't break out as bad and it makes the skin nice and smooth!

i just wanted to add as a side note that if you do plan to shave and be sexually active, keep it shavedand smooth or grow it completely back out...its really uncomfortable for a girl..in my opinion to be having sex with a guy thats alil rough around the edges down there...i told my bf to never shave again! haha..just keep it natural