Well, I was on the pill for 12 years, and come off in 2001. Took approx 8 months for them to start, and they were regular for approx 6-8 mths. I seem to get one every 6 wks or so. When they do actually happen, they're quite normal, not too painful, not too heavy. I've had an ultrasound scan (to check for cysts) but nothing was found. I've done a couple of pregnancy test too, and I've definitely not been pregnant.
I worried about it for some time (still feel abit uneasy) but tests have found nothing wrong, so what can I do. I'm a bit old to go back onto it (health risks) so I'm stuck.
Not much help to you I'm afraid - but you're not alone!