Bathroom after sex?

ca
Hey guys, so normally my fiancé and I use the pull out method, I think it works as long as your guy knows what he's doing. Unfortunately for me, my fiancé and I had a slip up and he cam inside me, it was not very much at all but that's all it takes, so I took an emergency contraception pill, it was the tablet off brand of plan b one step, same amount of hormones and such, I took it about a day later. Right after intercourse I went to the bathroom and peed. So my question is, does this help my chances of not being pregnant? I've heard going to the bathroom after sex gets most of the sperm out, but this might just be an old wives tale for all I know. My anxiety level is so high now, but I'm hoping the pill and going to the bathroom directly after will help any?