I've been TTC for 6 months or so, tracking my ovulation & periods like a good girl, etc etc. And it's just occurred to me...
I take the first day of my "proper" bleed (the first day I have to use eg a tampon or mooncup) as cycle day 1, but I normally start spotting 1-3 days before this. Should I be taking the start of spotting as CD1?