TTC question

Ok sorry for posting so many questions lately lol. But again, I just got off the pill, I was supposed to ovulate yesterday and today I had a lot of clear white discharge. We BD today and I was just wondering.. How long do you stay in a laying position after your SO cums? I did for about 5 minutes then got up to pee. A lot of it comes out when I used the bathroom but I know it takes one sperm to travel inside. Does anyone think it could be possible for me to get pregnant this soon off the pill? Like I said I had a lot of discharge which could have been ovulation.