fingering, chance of precum on finger

Hey so yeaterday I was with This guy and things got heavy. He was fingering me and then like fixed his pants so he could "dry hump" me. He had been fingering me before I gave him a blow job and then he helped me with it to finish him Bc we were on a time limit. But I know while giving him the BJ I didn't think the hand he helped with himself was the one being fingered but I still worry that the precum when he fixed himself could have been in his fingers when he fingered me. How high is the possibility of me getting pregnant? My fertile window beings in 7 days.