Cm question! Before AF vs. BFP

Kristen
I have a question.
​   Let me start by saying I took an ept at 9dpo and got a bfn. AF is due on May 2. I've had slight cramps (short lived and not nearly as intense as my AF cramps), slight nausea here and there, been a little moody and dizzy, BUT no signs of my usual sore breasts, mood swings, etc... 
​ I'm relatively new to Glow, so I don't have my cm charted for last month. As far as I can recall, my cm diminishes before AF (I could be wrong though, I honestly can't remember 100% either way). The last few days it seems as if my cm is increasing. I ran to the bathroom thinking AF came early, but it was just a lot of thick, creamy cm (sorry tmi). What have your experiences been with cm? Do you have a lot before AF, or does it go away? Have you had this before a BFP? Any input would be helpful, I'm so confused! All PMS and early pregnancy symptoms are the same! -__-