I am at CD20 and have been using OPKs since CD14. The first was stark white, the second had a light line and then the next was a little darker, but the past 3 tests have all looked the same!?

I didn't O until CD35 last cycle so I guess it would be too good to be true to ovulate two weeks before, but I was getting so excited when the lines were getting darker! Any ideas?

Thank you!