I use flow and <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow apps</a>. I’ve used flow for about 2 1/2 years. I’m constantly tracking everything there. My periods, symptoms, sex everything and glow I’ve used for maybe 1 year tracking everything as well. Earlier this month flow told me I ovulated July 6th, then last week I looked at the calendar and it said ovulation happened the7th. I just looked this morning and now it says I ovulated the 8th and my expected period keeps changing to a day later.

Does anything know why this might be? Because I keep adding things to my log? I’m ttc and wondering if this is why I keep testing negatives because my ovulation date might not be correct and implantation hasn’t occurred yet?