Lines getting darker?

Courtney • I`m 27 and married for 7 years.. Baby #1 born April 2013, Baby #2 born December 2014, and Baby #3 born June 2017 and due July 2019 with baby #4 :)

These tests were taken the 28th, 29th and 30th of September . Haven’t tested since the 30th.. Do the lines seem to be getting darker?