SO CONFUSED πŸ€”β”β”β”β”β”

Marianna
The below chart is from another ovulation app that I'm using. The hi-lighted boxes in green tells me when I'm the most fertile. Now I know this may sound weird to some but I should be having sex during those days or should I have sex after? Could this be the reason as to why I'm not pregnant cause I've been doing things vice versa? Thank you in advance ladies 😊