Actually, last night I had oral sex with my gf, I did thought that she's a virgin so we were just playing around. After a while I kept rubbing my penis over her vagina and ejaculated on it. I checked on some websites it mentioned that a girl can get pregnant even if she's a virgin cause the hymen walls aren't so thick. She's herself confused whether I ejaculated inside her or not. After reaching her she informed me that her stomach is paining abit. Now I don't really know how to figure out whether she should take a birth control pills or not. Please Help Me in this matter. Its Urgent.