I took plan b on February 1st and I got my period on February 18th. I was due for my next period around march 20 but I never got it and I'm currently like two weeks late. I've been cramping for those two weeks and having sore breasts. I've also been getting this brownish discharge when I put my finger inside and pull it out. It also has that smell that i normally get before my period comes (I know gross) but my period never came. I took a pregnancy test and it's negative. Could this be from the plan b that I took 2 months ago? I'm going to the gyno tomorrow.