BC Pill...

So I started taking the pill 3 weeks ago... My doctor said to wait 7 days from starting the pill to have sex, so I did. I finished the first three weeks of pills and started the sugar pills 3 days ago, but I haven't gotten my period yet.. Does it normally take a couple days after stopping the pill? I'm going to talk to my doctor, I just wanted to see what you ladies had to say!