My last period was nov12 and I shouldve gotten it around dec 12 but didn't. I had sex the 23 and today (jan12) I got some brown disharge that was light. And I still haven't had my period. Can that mean I'm having brown disharge just because its late or could I possibly be pregnant?

If you had sex, yes it is possible for you to be pregnant. Sex=babies. The only way you can know for sure, is to take a home pregnancy test.