So, a few things. First, peeing before sex has no impact on not getting pregnant. None. That's a false myth. Women can get pregnant when a penis is inside of her even if the guy doesn't ejaculate. Always use a condom. However, the chances of pregnancy here sound low. And you used emergency contraception which means any low chance you had was likely taken care of. I would not worry at this point. You did what you can to prevent after the fact. Pregnancy tests are pretty accurate about 2.5 weeks after the sexual encounter. The first day of an expected period is around that time. But things like added hormones from emergency contraceptive or stress can make us late so don't panic if you are. You can't rule out pregnancy until you've waited the appropriate time frame to test but I sincerely doubt you are pregnant from this. Buy condoms, they save a lot of worry! good luck