help...😔

Idk if I'm just paranoid or wether I should be worried or not. Saturday my bf fingered me but before he fingered me he wiped off his hands with a winded wipe of somthing like that I don't think there was anything on his hands but we wanted to be as sagar as possible. Is it likely I'd get pregnant from that? I'm suppose to start my period in 4 days and have a really regular cycle. I'm freaking myself out😔