8dp5dt line progression

Jenna

I had a 5 day embryo transfer Friday 7/30 I’ve had a positive since 4 days post transfer. I’m not feeling too confident in my line progression I think for my hcg to be doubling the way it should it should be darker by now. Has anyone has similar progression and a successful pregnancy/transfer? After 2 prior chemicals I’m worried this is history repeating itself