your late now then take a test. anytime your having unprotected sex you run the risk of getting pregnant
im currently pregnant right now, and before i found out for sure that i was pregnant i had sore nipples, and tenderness with both my brests..i also had tummy aches wich resulted in morning sickness later on...but you never know so i'd just say buy a pregnancy test now, and few for later on if your still not sure...