Has anyone had falling HCG and continued with a normal pregnancy?

Has anyone had falling and rising hCG in early pregnancy?

Back story

First faint positive at 6dpo - it gradually got darker until 10dpo (BFP on a line test and a digital) now today, 11 DPO, all of my tests are practically negative - the same faint line that I had from 6DPO to 10 DPO.

I'm driving myself crazy with probabilities. I have blood work tomorrow and a doctors apt on Tuesday.

I don't have bleeding or cramping yet.

I feel like this is some kind of sick joke from the universe though.

Looking for other stories, both good and bad.