I had unprotected consumption during my fertile period, but I took plan b pill within 36 hours

Lmp 1/15/14 had unprotected sex on 1/26/14 @ about 2 am which I was fertal ..today 1/27/14 I took the plan b pill a bit before 4pm which is around 36 hrs but the problem is that im not sure if he came inside me he doesn't remember he was drunk I dnt either but he usually pulls out and cums in my stomach I dnt have anything he put his underwear on and touched him his underwear was wet of cum im freaked out but if I come out prego its meant to b