question: from: anonymous (kindly dont mention my name in your reply, thanks) hi doctors i am 37 yrs old with very regular menstrual cycle of 26-28 days. me & my bf had an unprotected sex yesterday afternoon. the first day of my last period was last may 7 and yesterday was my 13th day, im fertile right? i took 4 white tablets of nordette pill (its a 21 pill nordette) yesterday at 6pm and took again at 6am 4 tablets after 12hrs. question: will the chances of being pregnant high? or will nordette pill prevent it? when do i expect withdrawal bleeding? is this means that im not pregnant? how will i be so sure? when do i expect my next period? please help. thanks.