Morning after pill, period a week later?

Hey, my girlfriend took a morning after pill on wednesday cause we were having sex and the condom broke. And she just finished her period last monday but for some reason her period started again yesterday. why has this happened? is everything ok?Morning after pill, period a week later?
I speak from experience if she took the morning after pill it is highly effective that she did not concieve. Her next 3 periods should be irregular due to the pill itself. She is fine...Go ahead and search through the internet it will pretty much say the same thing I am telling you. If you are all concerned have her see a doctor.
Might be hormonal embalance due to stress....it happens to alot of girls. If it keeps being irregular then she should keep them documented and a doc can give birthcontrol to regulate her period again.
Yes everything is fine. The morning after pill can possibly start bleeding again for some people. Each case is a little different but its normal for those who have taken the pill to start again or continue as if they hadn't had their period yet. If she didnt bleed, thats when I would worry. There are always side affects to these things.....the best thing to do is read the information that came with it. If she doesnt stop bleeding in a few days, go to the doctors.
the pill probably just threw her hormones out of wack causing an irregular period. Give it a bit and she should be fine with due time. Smart move taking the pill afterwards though