Is birth control enough? Ladies, what do you do to make sure you don't chance a pregnancy risk after being creampied?

I'm going to visit my lady friend next week. She lets me go in raw but is scared of getting pregnant. Idk if she's on the pill. I'm going to ask her today. But besides the pill, what can she do to make sure she doesn't end up pregnant besides plan b? I hear taking a piss helps with something? Douching doesn't appear to be recommended.