*TW* I have so much anxiety, opinions needed!

I am currently 4 weeks exactly. I know I'm still really early, but I have been having on/off cramping and back pain for probably over a week. I don't remember experiencing this with my other two babies, but I had a miscarriage over a year ago where I began cramping, my lines never got much darker/eventually started to get lighter, and it ended in miscarriage close to the 6 week mark.

I know I should stop testing and just relax, but it's so hard because the last thing I want is to lose this baby.

Looking from the top down, do we think these lines are getting darker? I can't even tell at this point because my eyes are just over it. These are about 24 hrs apart for each test.