First things first - rule out that you're pregnant.
How regular were you before going on the pill? The reason the pill makes you regular is because it forces you to be. So if you were irregular before, you'll probably be irregular now.
But it can take up to a year for your body to normalize after stopping the pill, although most women will be back in the swing of things within a few months. It took me about 3 months, and although I ovulated right away I didn't have a long enough luteal phase (the time between when you ovulate and when your period starts) to sustain a pregnancy until my third cycle.
Are you sure you ovulated? Once you ovulate, it typically takes a women 11-16 days to have their period (I remember my first cycle off the pill my luteal was only 9 days). If you haven't ovulated yet, you're not going to get a period.