Hi. Im Jessica Abar, 19 Years Old. I Had Sex

Hi. Im Jessica Abar, 19 years old. I had sex with my bf last 3 days, january 7 2016 but he did not ejaculate inside my vagina. The first day of my last period was december 27, 2015. Im having 2 days dark brown discharge. Aside from that, I dont feel any symptoms. Is that vaginal discharge a sign of early pregnancy? Thank you