Nervous, when do you get period on inactive pills?

Thanks in advance for your help. I just stated on hormonal birth control, have not missed a dose. I am now on my 3 inactive pill and have not yet gotten my period..... For those of you on birth control, do you usually get your period day 1 of the inactive pills, or do you find its usually delayed further? I had assumed I would get it day one of the first inactive pill, so I'm getting a little anxious and wanted to see what people's experiences have been. Thank you!!