Late period?

I had unprotected sex December 5 which was the last day of my period (I wasn't bleeding or anything). He could have easily came in me, but I don't think he did. Anyway, so a week later I started having clear discharge all day long for almost two weeks. My breast are very tender which has never happened before, and now I'm 2 days late. Could I be pregnant or ? I just don't know what to think .