Lines are getting lighter

Candyace • 1st time mom. 💙🚹

What does it mean when the lines are getting lighter? And don’t ask me why I’m still taking test when I already got a positive, LOL. I’m just overly excited/nervous and still in disbelief. The first two first response test that I took, both lines were very dark and my period was only one day late, today i hit 5 weeks pregnant and the lines are getting lighter. This is really making me nervous, is the HGC hormone getting less and less? Why!!??