Positive opks cd5,6 and possibly 7, then they started to become negative but we're still dark. Took another opk yesterday at 11am which was negative but dark so I thought maybe I was getting a second surge (I started my "officials" green week according to FF yesterday) took another test around 6-6:30pm and it was so light. The lightest it's been this whole cycle. What would any of you make of it?