I'm CD 15, second cycle since stopping the pill. It was 28 days between stopping the pill and having my first bleed, then 27 days between my first and second AF. I've been using OPKs since the beginning of the week, they started off very faint and now negative. Is it possible that o just haven't ovulated yet? I don't think I've missed the surge as I was only on CD8 when I started testing and now there's nothing.