Worried

Enerica
Hello lady's , I need help! 
Can someone explain to me why my <a href="https://play.google.com/store/apps/details?id=com.glow.android">ovulation tracker</a> is telling me that am suppose to ovulate today, but when I took an ovulation test is negative ? Am doing everything I can to have a baby. It would change my life and my boy fiends 🙌