I think I might be pregnant. I had unprotected sex two weeks ago, and I was not taking my birth control properly at the time. On the third day I took plan B, but it was only 58% effective. I was supposed to have my period the day or two following sex, but still have no signs. I have had light spotting, three or four days of morning sickness (although none within the past few days) and my boobs have been sore. The spotting stopped a couple of days ago, and now I am experiencing a brown discharge. I have been taking my birth control correctly for a week and a half. What does this mean?