Definitely getting darker?

I'm supposed to go in for an hcg level check in another day. My nurse told me to just wait a week and come back and to see if my pregnancy test gets darker. I've never heard of that... does this look like an okay progression? Should I stop testing at this point? I think I've been staring at these too long, they all look very similar to me. Anyway! Please send prayers! I have two girls, 10 and 2. I had 3 early losses before my 2 year old and tried for her for 3 years. This time around was immediate so I feel like I'm gaslighting myself!

2 days ago:

This morning:

& the new Dollar Tree tests