It's very unlikely you are pregnant. But stop your confusion please read about how menstruation and ovulation work, and also about how pregnancy works so that you will know in future - its something every girl and woman should know, it gives you control over your body. Also the pull out method is not a good form of contraception at all.
Increased urination is a symptom most likely to develop weeks after a missed period. If you miss a period then you should worry, most women don't have symptoms until after that. Try not to think about it, because thinking about it often causes your brain to create symptoms that aren't really there at all, like ghosts.
You could always try to get hold of a morning after pill to terminate a possible fertilised embryo.
At the end of the day, what's done is done, relax.