Ovulation question?

Marilu. β€’ 36 years old. πŸ‘ΆπŸ»πŸ‘ΆπŸ»πŸ‘ΆπŸ»πŸ‘ΌπŸ»πŸ‘ΌπŸ» πŸŒˆπŸ‘ΆπŸ» and expecting...,, YES ANOTHER BOY!!! Team blue forever EDD 11/6/18
I started testing for ovulation on Tuesday. CD 16. I got a barely positive. CD 17 pink line super dark so positive. CD 18 positive and dark as well. Today CD 19 again very dark. How many positives I'm supposed to get? U read the fertile window can be up to 6 days but does that mean I will be seeing polite all the way? Please advice!Β