Looking for some hope

Had a miscarriage a year ago. Finally got a positive test July 10th 2025 Had my hcg levels checked as soon as I found out I was pregnant. They were doubling wonderfully every 36 hours. For about a week. Last draw was July 23rd and levels were at 3,973 They stopped checking as they liked what they saw. Had a dating scan today (July 28th) Which would make me 6 weeks pregnant. Scan showed a sac and embryo measuring 5weeks 6 days. No heartbeat yet. I was told to do another hcg doubling check.

Levels are at 6,803

they never doubled.

Still holding on top hope for my partners sake but already thinking a miscarriage is about to occur. Anyone have any positive stories of slow rising hcg during the 5th week?