I had unprotected sex on the night of December 17th, all day December 18th and 19th. I took plan b on that Thursday afternoon which would have been about 65 hours from the first time we had unprotected sex. I was ovulating because my period was not due for another week. After taking plan b, I had a brownish discharge for about 4 days then had an irregular period lasted about 3 days. Then this month my period was only 2 days and then it just stopped. Now I have this brownish discharge and only light pink blood when I wipe. Could I be pregnant? I have taken a pregnancy test and it was negative. However, I have been having these crazy stomach spasms (that I have never experienced), dizziness, feeling like I am going to throw up and urinating so much that I am about to explode. COULD I BE PREGNANCT? I have a daughter and with her I had what seemed to be a period for almost 3 months (I was 11 weeks before I found out I was pregnant because of the "period").