Pos opk in the evening

So this morning I thought I got a pos opk on the wondfo test. I then took a clear blue dig test and saw what I wanted to see, a non flashing smiley face. What I actually saw was just a circle, meaning low fertility. I'm getting an IUI so I assumed I was going in tomorrow. While reading some of the post in an ovulating chat room,

a few moments ago, I realized I saw a low fertility empty circle. I re tested with wondfo, it was clearly positive where this mornings was close but not yet. Tested with the clear blue and got my non flashing smiley face.

When I got pregnant with my son, I also ovulated in the evening, so I'm feeling optimistic.