What Causes Delayed Periods With Yellow Discharge And Sore Breast?

I am about a month late for my period, today is Feb 21st and my last period started on December 31st. I have unprotected sex a few times a week. I have yellow discharge, sore breasts that seems to get worse at times, seem to be hungry all the time, could I be pregnant? I just had an ovarian cyst rupture in the beginning of december...