thank you for your query.
Am glad you realize that Postinor is no contraceptive
, and it goes a long way in messing up the pattern of your menstrual cycles.
Now, for the postinor side effects.
it does cause abnormal bleeding pattern.
Hence, what you experienced a week after taking it, is most probably the effect of Postinor.
I think you should wait till the normal expected time of your period.
If you miss your period by more than a week consult a gynecologist.
Postinor can delay or hasten your normal period by a week also.