Faint control line?

I took the first tests a few days ago they were a different brand.

I took a test today... and the control line is super faint. I would only be about 3-4 weeks I had a period right around Christmas.

Why would the test look like that so early?

I had an ultrasound today and they didn't see anything yet but its so early that they most likely wouldn't see anything yet anyway.

I am just afraid... I have had 2 miscarriage already before I had my daughter in 2020