Hi Cals
Maybe ov was delayed for some reason? I get that when stressed or travelling...I even wonder if looking for EWCM might delay it...
If you GOF'd on Monday, the swimmers will live inside you for a few days (5-6 according to stuff online), so if you ovulated today, they may have been waiting
I say GOF again tonight, preseed will help cant do any harm and might be fun.
hope that helps