Ok, so I am really struggling with the OPKs...
I've been using Clear Blue because it gives me a really clear definitive answer.
So on Saturday I got my first smiley face, which was (according to my Ovia App) cycle day 16. We DTD that evening and then on Sunday I got another smiley face. DH worked on Sunday, so we were going to DTD again when he got home, but he wasn't well at all so we couldn't. Have tested again today and there's no smiley face.
I'm assuming that means my window has gone? Confusion is, I recorded everything on Ovia and it still says I am still fertile on the app and gives it a rating of 7.5. So am I still in a fertile window?? Sooooo confused!!!!!