I Have An Unprotected Sex With My Gf But I

I have an unprotected sex with my gf but I haven't inserted my penis. During sexual pleasure I just rub my penis to her vulva(upper-body part near vagina) and some sperm droplets fall on that.Can she get pregnant with that.As we are very worried please reply fast, It's more been more than 15hrs after that sex. She is having cyst problem also can she take contraceptive pill to avoid pregnanacy?