Okay. On December 23rd I had unprotected sex and I took a plan B pill a few hours later. This was during my fertile window. A week before I started my period I had brown discharge and light cramps. I started taking birth control pills for the first time the day before I started ( I mistook the discharge for the start of my period). My period was shorter (4days) and lighter than it normally was. I kept having brown discharge and cramps after what I believed to be my period. I had sex again with my fiancé and I spotted bright red just once. The brown discharge is back and I have been having weird symptoms. I've been getting nauseous at night and I even threw up last night, I've been tired and emotional for a couple weeks. I took a pregnancy test about a week ago at night and it was negative. Is it possible that I got pregnant on the 23rd? I think I'm going to test again tomorrow morning with fmu to be sure. Am I being dumb or is this possible?