So my friend had sex only 3 days before her period was due (on the 10th, due the 13th) at 1am, and took the MAP around 11am the same day, and still no sign of her period. Do you think she should be testing or that the MAP can affect your period that much? I've taken it and it made my period come quickly? But I have heard it makes some people late. So I'm not sure what to advise??