So I had unprotected sex for like, 7 minutes over a week ago and couldn't continue because I knew it wasn't right. There was no ejaculation or anything. I went and got the Plan B pill within 72 hours of this happening. When the Dr. gave me the Plan B pill, she said to fill my BC prescription and begin the very next day, because taking Plan B signals the end of that current cycle.This is my first time being on the pill in over a year. Does this mean that I should get my period at the end of this BC pack, not when I was originally expecting it??