Yeah maybe I'm a little late, but if she's willing I'd encourage her to go on birth control. I have been through a couple of pregnancy scares with my gf and they are NOT FUN. We now use birth control and condoms every time and its much less stressful for us.

Be prepared for her to have bad mood swings for a while because it does take some getting accustomed to. On the plus side it sometimes makes your gf's boobs grow... Pretend you didn't read that chauvinistic comment.