Sex 2 wk ago, w/condom but dark discharge for 5 days. period due in 10 day but brief cramps and sore brests yestrday. is it just period due? or worry

Condoms aren't 100%: ...effective, so, if you & your partner have been having sexual relations, pregnancy is possible. On the other hand, this could be a simple mid-cycle hormonal mix-up. It's too late for Plan B and too early to worry. If your period doesn't come when it's due, take a pregnancy test. If you have regular sex, consider adding another form of contraception. Less chance of pregnancy=less worry!