I want to take nordette oral contraceptive pill . I had my period for month of February and March. But for month of April no period yet until today May 3, 2012. My boyfriend is coming 12 days from now, March 15, 2012 so i wanted to get protected if we have sex. But as instructed i should take pills starting first day of menstruation but until now i dont have it yet. So what can i do? Should i not wait for menstruation and take it, would it be effective still? Thank you