AF is due on the 4th for me. I just started using ovulation tests, as I'm glad I did. I found out that I don't ovulate when glow says I will. I tested throughout my fertile window and got nothing, then the day after my fertile window closed, i got a very dark line and me and my hubby waisted no time! I'm trying not to stress about it, since I don't want to get my hopes up. We've been TTC for almost 3 years now. Hopefully this is it!