Oh OP, please stop focusing on these tests.
They are not designed to track your pregnancy progress, they are designed to tell you if you are pregnant or not.
I have been pregnant 7 times, I have had 4 MC, two very early and two much later.
Every singel pregnancy was different, with some I had zero symptons until 10 weeks plus, with some I felt odd form the beginning. With two I had a lot of bleeding that wasn't anything to worry about.
One MC was textbook perfect pregnancy until the scan. There is no match between what the pregnancy was like and whether it was a MC or a viable pregnancy.
These are not rigid scientific rules, it is you body and it varies and changes. It is perfectly normal to have no symptoms, and not even know you are pregnant in those first 8 weeks or so.
Step away from the tests, continue with daily life, unfortunately you just have to wait, very hard to do, I know, but it is true.
The only thing that helps is an early scan, as the heartbeat is so reassuring.
xx