Line not getting darker

Ash • TTC 8 years - 6 clomid IUI’s - 👼🏻 x 2 - IVF July 2019 w ICSI & PGS - ❄️❄️ FET #1 Oct 2019 BFN - ERA Feb 2020 - FET #2 Sep 2020 BFP!

So my line isn’t really changing. Should I be worried? I miscarried at 6 weeks 5 days in June.

Has anyone had experience with this happening & ended up with a successful pregnancy?

I can’t get lab work until tomorrow, so just looking for some advice..