the pill and the morning after pill

So I'm on the pill but for the last week I've been talking it a couple hours after the usual time 
I had unprotected sex yesterday and he ejaculatated in me so just to be sure I took a plan B 
They say if you don't get ur period in 3 weeks and all that and I'm about to start the white pills tomorrow (the sugar one) do you think I should have my period or will I be fine to skip my period ?