Hi I have recently been through the same thing. Stopped pill in June, 8 weeks later still no period. Then I got a very light period and ovulated 18 days later, then got AF 6 days after that...then ovulated 27 days after that, then AF 9 days later and now just finishing AF. So not much help for you I know but I got my AF before ovulating the first time around but you might ovulate first..hard to know. What has helped me is temping and checking CM. Its very frustrating though that first 8 weeks was tough. I did go to the GP at that time and ofcourse they told me to wait, relax, just have sex for fun! and it will happen..blah blah, anyway they took blood tests at that time which showed I hadnt ovulated yet. So maybe go to GP if it doesnt arrive soon.