I had unprotected sex on Jan. 3, 2016. It is now the 28th of January. The ending of my last period was on Dec 20th (last month). My period is late. The day I had unprotected sex I had took a plan B pill about 72 hours later. I have notice a light sort of brownish/pink discharge these past 3 days but yet I haven't started my period. With some online research I read that most women have a brownish pink discharge of an early sign of pregnancy but most women don't notice. I have been noticing little changes such as my increase of cravings and getting hunger sooner then usual. I also feel like my sense of smell has been much more stronger & at times I feel lightly nauseous. Do you think I might be pregnant or just paranoid???