No Af yet?! (Tmi)

Nicola
So I am due Af today (26th).
Recon I ovulated on or around the 12th.
On Friday I was still having thick, creamy cm.
Yesterday, thick and creamy again (only when I wipe) and one showing a tiny bit of brown spotting. Also had cramps so sure Af was on the way.
But today, cm has gone from watery with the odd bit of white this morning, to a snot like texture later on. And it's only when I wipe. This is unusual for me...
Going to test in the morning if still no Af.
Just wondered if anyone had experienced a thing like this and gone on to get their bfp?
Thanks ladies xx