I've been using the opks since CD 5 just to keep track once each morning . Yesterday was first day I got a slight line ( thought ovulation would come in next few days ) I tested last night and I think line was lighter .... Than this morning it was barely there . Did I miss it or not ovulate you think !? Or maybe wait few more days . Today is CD 11 ! Glow says I'll be fertile day 12 - 16 .