Time to start OPK'S

[Powell510]

Got my OPK's in the mail today and took one and its almost positive! I tried to upload a pic but my phone says the file it too big

 

[shivangi1210]

I start testing from CD10 once a day, its a bit early for me though.
And once the line starts darkening I start testing Twice a day in afternoon and in evening.
I caught my surge this time accurately.
I tested at cd 18 in Afternoon, OPK was negative (Control line was slightly Darker then Test Line) and in Evening It was Positive and it remained positive next day as well.
GL