Eeek I've fucked up. Don't usually ovulate until around CD20, so thought I was good to go ahead and TTC this month (yes I realise a potential baby due on 31st Dec or something could come on Christmas Day anyway but it didn't seem as risky).
But I ovulated on CD13, and now if I'm pregnant it'll be due on Christmas Day.
I'm certain that this will be the month, precisely because I really don't want a Christmas Day baby.
Join me for the two week wait if you have screwed up too!