... medication so I took plan b. The sex occurred on Thursday December 4th. I'm supposed to take my first sugar pill tonight (Sunday December 28). I've had brown and light red spotting for the past few days, does that mean I'm pregnant? That is unusual for me. I have had no other symptoms of pregnancy except tiredness and lower back pain but that often happens before I get my period. I am 6 feet tall and 213 pounds