I had unprotected sex on most of the days of my ovulation week. I got a normal period in may and june but i have been experience nausea,dizziness, headaches, cramping, bloating, frequent urination.I have a 28 day cycle, I am currently on my period now which was 3 days late I bled for the first and second day now I am experiencing a brownish discharge. what can this be? Is there a possibility that i can be pregnant?