Is Pregnancy Possible Through Non Penetrative Sex?

me and my gf didn't have sex but we were rubbing each others genitals..
she had my precum on her hand and i rubbed her vagina but there wasn't anything on my hands..
i rubbed only the outer side of her vagina..
she's worried that if i had some precum on my hand then she might get pregnant..
i last masturbated a day ago and also pissed 5-6 times till then..
are there any chances???