Is the line supposed to be darker?

Ni

I had a blighted Ovum my first pregnancy which was also an “oops” so I never paid attention to signs, symptoms or tests. Now that this is planned and my anxiety for miscarriage is at an ALL time high, I am worried about everything. Blood test on Monday but just curious...at 3 weeks and 5 days, 1 day before af is due, should this line be darker or is it supposed to/will get darker? Thanks ladies!!!