After my gf gave me a blowjob I ejaculated in the bathroom, washed my hands with water (no handwash) and after 2 min we again engaged in the activity. We didn't had sex but I was fingering her deep down. Are there any chance that she might get pregnant if I had any traces of microbial semen in my fingernail. She was going to have her periods after 4 days and is it essential to take i-pill?