Lines progressing but not like previous pregnancies

[abbaroony]

I know no-one has the answer, but please humour me as a person who goes slightly neurotic when TTC and who has a POAS addiction.

I have been testing since 9dpo (when I got BFPs on previous pregnancies) and got a BFP at 12dpo but the lines showed little to no progression for the next few days. At 16dpo I did get a stronger line but compared to previous pregnancies the lines are just so much weaker. I'm gearing myself up for it being a chemical, but just wondering if anyone has experienced really slow progression and had a positive outcome?

I also have no symptoms which isn't helping the paranoia.

Photo shows this cycle at the bottom and a previous cycle above.

I'm confused by the 2 groups of tests?
Progression looks fine to me on those kind of tests - i never really got them to get that dark and that was with twins

The top group of tests is from a previous pregnancy where the lines were much stronger.

The bottom group is my current tests - much lighter than I have experienced before so I'm worried it will end as a chemical.

The bottom set of tests show good progression though? The lines are getting darker and darker just like you would hope / expect.

Agree with PP, they look to show progression and are strong?

Zero signs of a. Chemical you can’t compare 2 pregnancies. It’s different everytime. You’re pregnant congrats !

Thanks so much!
Just struggling to believe it could be real and trying to protect myself a bit after multiple loses. We had to do IVF for my son and this is natural so just feels like a bit of a shock even though we were very much trying!