I just stopped using it at the end of my last cycle. We'll see how long it takes, but I had regular cycles since I started my period when I was 12.
I did ask my doctor about being off it a certain time before TTC and she said that as soon as it's out for more than a week it's completely ineffective and the hormones are out of your body. If you've ever read the package, the company says 3 hours and it's ineffective, so I think there's a chance to get pregnant as soon as you get off of it, just like any other form of BC.
Sending lots of baby dust your way!