Question about clear blue pregnancy test

Abbigail • Married and expecting a little boy on May 16th, 2016!! 💙😍 we love him so much already!
I got the clearblue non-digital test and took two and they were positive! BUT after a few hours the positive line started fading! And now they are still positives but very very faint positives. What does this mean? Why would it fade? Never had this happen before or even heard of it 
3 minutes after taken
A day later