Are these getting darker?

KP • Mama of two DD 04/14 and DS 03/16. #3 and last due 3/19
I had a chemical before dd July of 2013 so I'm paranoid about my lines getting darker. I took wondfo and the last frer. The frer are 2 days apart, the wondfo is one. Do they look like they are getting darker? I feel like the wondfo tests barely get dark.