Line getting lighter, not a chemical?

Hi

I’m 12dpo today, first positive on 9dpo. Did a blood test yesterday that came out positive but low (34mui/ml). Yesterday evening I did a test (first pic) and results were stronger than this morning with fmu (second pic). Is it possible that it’s not a chemical? Did it happen to you and pregnancy was normal?

Getting really depressed here 😔

Thanks!!!