Line progression, should I be worried?

Sara

Hi there! I'm 19 dpo I believe, and these are my FRER's since I found out (two of them are FRRR). I just tested today and I'm beginning to worry. Feel like not much progress since 10/12... and even today looks almost lighter. Mind you it's not FMU and about a 2 hr hold max. Anyone had snow progression like that and pregnancy was ok? Really concerned, it's my first baby and I had a chemical last month at 4w6d (which is how far I am today).