You all beat me to it.
If a girl is at or near ovulation, she's probably going to get pregnant wether she pushes it out, uses a douche, cleans herself out HOWEVER.
Sperm are microscopic and once they're in, they're in. They can creep up there even if you just cum on the outside of her vagina.
Also, remember that pulling out doesn't work either. There's always a little bit of "pre cum" on your penis and that contains as many sperm as a full load.
Please wear a condom