possible to be pregnant?

Olya
I take the pill, so that last week don't take the sugar pills. My period doesn't start right at the start of the sugar pill and ends earlier then the sugar pills end. For example: the sugar pill is a week. So if I get my period on day 3 of the sugar pill and it ends on day 5, does having sex on day 6-7 increase the chance of pregnancy? I don't take the non-sugar pill until the sugar pill week ends.