Quoting MAMA JDM YO:" I keep using opk just to see what happens and same exact thing lol I have one from last nite and one I just took right now. There dark http://img839.imageshack.us/img839/7933/imag4236.jpg"
have you tried using the other fertility markers other than opk? I don't have PCOS or any trouble getting pregnant for that matter but I'm currently using all those methods in an effort to not get pregnant since pretty much every form of BC is a challenge for me. Maybe try doing cervical checks for texture, length, opening and temp charting. I started using a fertility friend app on my phone that I really like, it's really helpful.