My gf is a virgin and i has been rubbing my penis outside her vagina at the lip and i had tried to push it but it couldn't go in so i keep rubbing. She said her vagina feels wet but i swear i did not come and there might be a possibility of precm but i did not ejaculated before i will do this. And her regular period is on the 18th of march but this is 28th of march (almost 2 weeks) and her period has not come yet. So i want to know if there are any possibilities of her getting pregnant? And how high is it?