What's my body up to?

Rose

So I posted yesterday asking about EWCM 12 days after ovulation and I got some advice suggesting that it can occur prior to AF which makes sense. Earlier in the month I thought AF was coming and had cramps etc. But now AF is due and I don't feel like it's coming- in fact the only thing I have really noticed is higher arousal (sorry tmi). I don't usually experience this with AF. I took a pregnancy test at 10DPO and got a BFN. So now I'm just confused! Has anyone experienced something similar or has some ideas around this? Any help would be much appreciated.