TMI but have an embarrassing question

Nikki • Married 2 years. Doggy mom to a Daniff. Pregnant with our first due November 2016.
Nobody tells you when your younger about TTC, so you all can imagine how disgusting it is when it all comes out:( my question is, do you guys wait for awhile after sex or do you go to washroom right away. My friend and I were discussing and she said to wait for at least 20 mins or more or just go to bed. I haven't been doing that and it's been 9 months with nothing, I always go to washroom after because I feel so gross:( any suggestions ladies??