Clear blue pregnancy test

A • 🦊Wyatt, Colson🐻, Ryker🦝 Mama 09/14/19 -04/13/21-8/29/22

So on Friday I took a regular clear blue pregnancy test along with clear blue digital.. I keep looking at the tests everyday and the middle line that makes it positive is disappearing... is that something I should worry about? ( same test.. I just keep checking to make sure that I am pregnant and the line has been fading away..)