Period date changed?

Paige • 27| Married 3 years| Expecting Baby #1 Oct. 2019

So I'm anxiously waiting to take a test. I use glow and <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a>.

two days ago glow said today was the day, and <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> said tomorrow.

today I check and <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> says today, and glow now says I'm two days late with a new period date for tomorrow.

I'm confused...?

and trying to decide when I should test.