I had un proteceted sex on 2/18/13 & 2/19/13 took the morning after pill 2/19/2013 the pill took affect ln 2/25/13 it lasted til 2/28/13. My normal cycle was due 3/14/2013 but I came on on 3/3/13 it was extremely heavy, five hrs later my flow was light pink, is the side effects of the pill?