Can precum float into the vagina opening

Patient: Hi,my girlfriend and i were fooling around on Dec 20 and we started rubbing each others genitals and i was rubbing my penis around her clit and vagina not near the opening of her vagina, i dont know if i had precum on my penis or not. is there a way that my precum could’ve float to the opening and swim all the way to the egg? Also she was suppose to get her period yesterday Dec 25 but she didnt and now we are both scared that she is pregnant. she is not in birth control pill either. so could she be pregnant?