Last weekend was my first time with a girl. We have been friends for 3 years, and last saturday we started playing, kissing and touching us for about 40 minutes while she get a little hotter than usual and introduce a my penis in her vagina. I inmediatly retreat myself and keep kissing her, but then again she introduce it again a little deeper (not so much) for like 3 seconds. I stop and started talking with her about it, She told me that i shouldn't have worried. On monday her period started. But i dont know if it could be possible to pregnant my girl with what happened. Please excuse my english. And thanks in advance.