Should I be seeing line progression this early?

I started testing at 8DPO and got a vfl. So far my tests from 8DPO, 9DPO and 10DPO all look relatively the same with a vfl that has not darkened much. I got a vfl on 2 different brands of tests so I’m certain it’s not an indent. Should I be seeing line progression at this point? The line is without a doubt still there but still very faint and not really darkening. I know I started testing super early so I’m trying to tell myself this is normal but after a chemical last month I’m just getting concerned. Not sure if this is because I’m testing too early or what 😞