Hi, so I took the Plan B pill 3 weeks ago after unprotected sex. At the time I had been on my normal birth control for a month in a half, but I wanted to be sure by taking the Plan B. And as of about Friday I have been discharging this brown,stringy stuff. And when I wipe theres pinkish blood. At first when this had all started I was only bleeding but then it turned into the brown and stringy stuff on Saturday. Is this discharge due to the Plan B pill? Or a pregnancy?