Plan b and the affects on your period

Mallory
So I took plan B then I got my period 2 weeks early. Then went on all was fine. Glow says I am supposed to get my period on the 11. So i am a week late! BUT if I got my period 2 times last month that would screw this month up right? So I should be getting it today.
I am still planning on going to the local pregnancy center just to get more information about it to make sure everythin is ok. Did weird period happen to anyone else after taking plan b?