Opk help

Nicole • 2 👼🏼👼🏼, 🌈 on the way 1-6-20

The app says I ovulate in 3 days. I’ve taken test morning & night for the past 3 days & they have all been like this? Is it normal to be this negative close to ovulation if the app is right? I just started using OPKs & BBT.