Where's my egg?

I have been testing for ovulation this cycle since cd9. At first I didn't even get two lines. For 3 days now I have gotten faint lines but still negative. Glow said I was supposed to ovulate today, which obviously I won't, but now my test lines are getting lighter :( My CM is ideal, and my cervix is high and soft, but no positive opk. Is there a chance I could ovulate without getting a positive opk? Or do you think I will ovulate later? Or maybe not at all if my tests are getting lighter? Thanks ladies!