Hpt line progression? Bad?

Heather • 26 yrs old. married. mommy to two. Ages 8 & 1. Pregnant w/ baby #3 💗

Need advice. I'm worrying my self to death.

I started testing way before period, my period was due this past Wednesday.

My beta on Monday was 20

My beta on Wednesday 35.

Go back today for 3rd.

My tests dont seem to be getting any darker. Past 4 days taken at 7:00am on dot.

They dont look lighter but not any darker.

Do I need to prepare for worst? I had MC in 2016 and my heart already feels broken