... new pack. So I got a week behind after I started them again. Now this month my pills tell me I'm supposed to be on my period this week but I haven't had it yet. Technically 4 weeks from my last period was over a week ago... I have been having sex but We've used a condom and as far as I know it has never broke. I'm really athletic and work out quite a bit if that matters. I'm really nervous though and wondering if I should be worried?