Is it normal that i am having a late period after taking plan b?

Possible: Plan b could make you rperiod be a day or two late, probably not much more than that.

It is possible.: Potential side effects w emergency contraception include: menstrual flow changes (spotting, bleeding, early or late period), nausea, vomiting, dizziness, fatigue, headache, breast tenderness & abdominal pain or cramps. Take pregnancy test & notify dr if your period is 7 or > days late.