If at any time you have unprotected sex, yes there is a chance you could be pregnant. It's hard to really go by symptoms you may be having though considering most symptoms are the same exact symptoms you get when you get your monthly visitor. The best way to find out if you are pregnant or not is to take a test if you miss your period, that is really the only way to know. As for your urine, usually depending on what you drink and eat effects that, i've never heard of urine changing colors meaning you are pregnant. Sore boobs may mean pregnancy, but then again it could mean pms. Just take a test if you want to be sure. I hope you get the answer you want! :)