Should the control line be getting lighter?

I am 6 weeks pregnant tomorrow and I have no symptoms other than feeling a bit tired. No breast tenderness at all and never had this. I had some light brown and red spotting on Monday for a few hours but not enough to fill a pad and i haven’t had anything since. I am super scared of a miscarriage so I keep taking tests. My dr said we will find out in time and won’t do any blood tests or anything.

Below is my progression from 11dpo to 25dpo. The last one I just took today at 6 weeks. Shouldn’t the control line get lighter and the test line get darker?