Tests getting lighter? Should I be worried?

Mandy • 26 years old - Married October 2013 - TTC for 18mo with Endometriosis & HPV - New Mom of Baby Girl Dec 2015 😊
Details: I'm 4+2; waiting on ObGYN to call back so I can schedule my blood test and first prenatal. Just worried. 
Top - yesterday morning; middle - this morning; bottom - 3 hours later

Vote below to see results!