Not pregnant this month

I'm due AF on Monday 28th, I have taken three first response pregnancy tests and all negative. I'm a little gutted but still smiling because as soon as AF arrives I will be starting the sperm meets egg plan and using opk 's so im very excited!! I think it will be good for me to try a new plan and stay with glow! I'm excited to try again and excited to see if and when I ovulate so not pregnant this month but still feeling positive!