Hi Charlotte77,
As Renstar says, there are all sorts of stories about coming off the pill. I also recently came off the pill after about 12 years non-stop, and my first cycle was only 24 days but the next was 28. I noticed more cramping but thats quite normal as the pill gets rid of some of the yuk effects of AF. Also I'm pretty sure I didn't ovulate last cycle - not sure if thats because of the pill or not?
Hope things 'regulate' soon for you and if you are TC then good luck!

(Oh Renstar...grrrrr, how frustrating for you. )