You start counting the cycle days from the start of your period, not the end . So if you get EWCM about 4 days after AF finishes, and AF is say 5 days long, that puts you at about CD9. Typically you get EWCM heaviest about 1-2 days before O, so perhaps you are Oing CD11?

I never get pregnancy symptoms before the BFP, and I think given how different our diets are around Christmas time, all of your symptoms could just be that. Best of luck with it.