Worried about a chemical/ectopic

Freya

I know I shouldn’t be testing this frequently but I can’t help myself. I’m worried. This would be Baby #3 for us but I feel like the lines aren’t progressing enough and the one from today seems lighter than the last days…what do you think?

P.s.: The last test was taken with the same urine as the one above…just later and it seems darker which is strange 🤷🏽‍♀️