HCG results help, first time pregnancy feeling worried

Hi everyone. After 4.5+ years TTC I’m currently roughly 5 weeks 5 days pregnant, and having some concerns. Here is the timeline of where things are at:

July 27th : first positive pregnancy test at roughly 8 dpo July 28th : quantitative hcg blood draw result 29.3 July 30th : quantitative hcg blood draw result 110.3 August 6 : quantitative hcg blood draw result 2,171.4 August 11 : quantitative hcg blood draw result 12,119 August 13 : quantitative hcg blood draw result 17,413

All blood tests were performed at the exact intervals of 48 hours apart, from each other. I feel like my HCG rise has slowed dramatically and I’m worried about how little it’s increased with this last draw.