Re: if you pee right after sex what are the chances of getting pregnant?
First of all, yes you can get pregnant even if you pee right after. You pee through an entirely different opening.
Secondly, if you had unprotected sex, then there will always be a chance you could get pregnant. If you took a pregnancy test after you missed your period and it was negative, I would wait a few more days and maybe try again...or you could have a blood test taken. That will let you know for sure. Look up your local planned parenthood.
It might also be good to go in and get some birth control. You might also want to be tested for STD's if you aren't using any protection. Its better to be safe than sorry.