Stopped taking cerazette a month ago, and still no period?

My boyfriend and I are TTC, but unfortunately no luck yet. I stopped taking my pill a month ago, and I am aware that lots of women have trouble with the regularity of their periods for up to a year afterwords. I missed a couple of pills in sept and my period came straight away and lasted for nearly a fortnight. Now I have chosen to stop, there has been nothing. Is it still possible to conceive?