Okay so my boyfriend and I were making out standing up and he rubbed his penis on the outside of my vagina for less than 30 seconds but im afraid of pre cum, then I performed oral sex on him and he ejaculated in my mouth. I had my period four days after this and it was a perfectly normal period bu could I be pregnant? Was my period too soon to know for sure im not? P.S. My boyfriend peed before anything happened, does that mean his pre cum had less sperm?!