Starting my fertile window today

Simone
I am starting my fertile window today and I am pretty excited even though I can't bed until Friday. Took a opk today and it was negative. Also found out that I will be with my husband on cd 15 this month and that's the cd I got my positive opk the last two months. So I will be bedding all weekend miss Monday and then bed on Tues, Weds ,and Thru.. hoping this is my month....