I got my period on December 31st to January 4th and it was nine days late. Then I had unprotected sex 4 days after my period ended. I took plan B the next morning and now it has be almost 2 weeks since I had sex and I woke up two days ago with brown discharge in my underwear. Then yesterday I went to the bathroom and there was dark brown and light pink discharge, but it then stopped. Then today at work I was cramping a little and went to the bathroom and had brown and light pink discharge again. Am I pregnant? Because I can not be pregnant. It was the first time I ever had sex, and I'm not on the pill. I'm so nervous