Dollar store HPTs in 5th week/line progression?

I used Dollar Tree tests (Assured brand) at 5+1 and 5+4, and they were both clearly positive, but the line didn’t get darker. In the picture, the lighting makes everything in the more recent test lighter, but in person they looked basically the same. I know you’re not supposed to keep testing or to look for line progression, but in the past I used FRERs and could see a change when testing a few days later. After miscarriages, I’m really nervous with this one. Anyone have experience using dollar store tests later on (5th or 6th week)? Did the control line get really light? Once the test line is darker than the control, does it keep getting darker? Any feedback appreciated