White Discharge two days after sex?

So me and my boyfriend had sex about 2 or 3 days ago and we use the pull out method. Yes we know its not a 100% or anything. We are not trying to have a baby but if it happens then it happens. But he pulled out right as he was cumming and some of his men did end up in me. But that was 2 or 3 days ago and now I'm having the white creamy discharge. I never had this so I'm not sure what it is or what it means. And i know its not my period as i just got off it a week ago. Please help