Precum on our fingers...

Guys... I'm worried and stressing. I went to the bathroom after making out with my girlfriend. I think I wiped precum off my head with my hand but I'm not sure if I washed my hands. Later... My girlfriend kinda rubbed my wet dickhead with her fingers. I fingered her but she also guided my fingers. What are the possibilities that she's pregnant? (BTW she finished her period like 2 days after this and I haven't masturbated for about 3 days, I took showers and obviously went to pee every time I needed to)