​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​OPK. I think negative but can’t tell for sure. Glow has me ovulating thurs, another app says sunday. Help?

Molly