When your boyfriend "pulled out", were you finished having sex? I mean, did he ejaculate into the condom? If so, there is a chance you could be pregnant. Some of the semen could have leaked out of the condom. You didn't mention how long it has been since you had sex. If you meant this past weekend, then it would be too soon for any pregnancy symptoms. But either way, frequent urination was one of my first symptoms. Even before I missed my period. Wait and see if you get your period. If it is late, take a pregnancy test. Good luck!
PS. If it hurts when you pee, you could also have a UTI.