Tests are light and getting lighter

L

I took a digital test on Monday evening, positive. Got a very faint line on a FRER, which got quite a bit darker the next day (Tuesday). Yesterday (Wednesday), it was lighter again, and this morning, it was almost as light as my first test. Is this a sign of a chemical pregnancy? I’m so worried. This is my first pregnancy and I want it so bad 😥

I’m getting a blood test today.