My bf touched n rubbed his penis to my vagina...but b4 doing this he washed his penis with water to remove the semen if present ...Then while rubbing he pre-ejaculated( thin transparent fluid from penis)...den after I peed washed my vaginas with water....v did this on 6th Jan...my last period date was 20 Dec today' is 27th no sign of period...worried am I pregnant...plz help !