Why do i only get positives at 4pm but not the morning !?!?

tiffany🌈 • Miracle baby due January 2020💓 01/09/2020 My miracle August Joe was born 🥰

First response is faint but it’s there i promise i could see it better in person then on the phone

Then below were this morning but the other morning it did the same thing and hen i got a positive in the evening it’s stressing me out