So I stopped taking birth control 4 months ago my periods were normal right off every 28 days right on some no delay.... Until this month I am a day late... I was using opk's and noticed a surge cd 13... Then again I got another very positive OPK on cd 17... So question is do u think I haven't been ovulating and just started this last month? So maybe I'm not late I'm just 4 days off bc of late ovlation? I'm trying to figure out something bc all my hpts are BFN!