Birth control question please help

So for this cycle I started my pack a week late because I didn't get a new pack on time. So now I just started my period yesterday (saturday). Today is sunday and that's when I should normally start taking my next pack but now that I'm only on day 2 of my period... do I wait until next sunday when I don't have my period? Or take it today? Please ask questions if I didn't make this clear enough and you think you can answer me xx