OPK question!?

Geri🇮🇪 • GeriHB Roscommon Ireland 🇮🇪 ..... Mommy to a beautiful little girl and a handsome baby boy 💙

Has anyone had dark OPK’s but suddenly had them disappear a few hours later? I’m so confused cause last few days they’ve been getting darker and darker but all of a sudden today it was barely there? Please comment if you have any insight x TIA