LBOT I'm sorry things are so random for you at the moment. I hope that GP has some useful suggestions for you. Hope you get to him sooner rather than later, too
My LP is usually 14 days. I say "usually", but I have only been charting for one and half cycles and this one isn't over yet, so it's possible I am not as regular as I think I am, IYSWIM.
Unless I am deluding myself, my cycle is always 27 days and I usually get AF in the morning, after I have been up a short while. I was up at 6 this morning and still no AF. I also have a reasonable amount of wet cm (can't remember whether that is "normal" or not) and no spotting at all, which is not usual. I am very aware that I spent a fair degree of this cycle freaking out about an important project deadline, so this could have thrown my cycle off.
If I can remember to retain my FMU and I still don't have AF in the morning, I'll test.