Opk and ovulation?

Ok ladies, I have recently found out that I have pcos. I have two healthy children that I had no problems conceiving that's why I was shocked to find out that have it. It has cause me to have one miscarriage in november. My problem right now is I really feel like I am ovulating. for the last two days I have had ewcm but my opk says no surge. So I don't know what to think. have any of you had a negative opk and really were ovulating?