Pregnancy test staying the same darkness?

I took the bottom test a week ago and the top one was taken tonight (see dates). The line is essentially the same darkness with slight variations because my urine was more diluted at times. Trying to figure out what this means. BTW I had a loss of pregnancy 5 weeks ago when I was 10 weeks pregnant so I'm trying to figure out if this is a new pregnancy or leftover hormones from the last one.