Line progression not getting darker 4 weeks

Back story: I had a misscarriage 6 months ago and then I had one depo shot been off it for 3 months and I found out I was pregnant at 10 dpo but at 16 dpo the line stop getting darker and hasn’t been darker the the control line.

I’m going to the doctors today to get bloods done. I around 4 weeks pregnant

Some of the test are taken every day in the morning. I know I’m supposed to test every two days but since my miscarriage I very scared of it happening again