Hcg levels down in pregnancy help?

Jess • Been with the love of my love for almost 8 years, married 17/08/19 baby boy 💙 👶 05/10/2019 baby boy 💙👶 April 2022 baby girl 🩷🧒 March 2024

I took a couple pregnancy tests which came up positive, I had a blood test which showed my levels were up but low, had another blood test which came back negative hcg levels didn’t indicate pregnancy. So now just had another test waiting for results. My doctor isn’t sure what’s happening said I could be pregnant, could be low rising hcg, could have been an error at the lab. I hate being in this limbo not knowing for sure, I’m anxious & trying not to worry but that’s hard. I had a miscarriage before I had my son & all this waiting & being in limbo reminds me of that time. Has anyone had low rising hcg? Or experienced something like this before?