Bb, if it was me I would freak not seeing them get darker. But that is me. I had a million tests lined up in my bathroom then still tested every week or so until I got my Doppler lol. A bit OCD maybe?? I do find it odd that they aren't getting darker but then again you are late for AF and this happened before. If it were me, I would keep testing. But in the end, it is what it is.