Worried about HCG levels 😳

Hi ladies

I am a bit worried about my HCG levels. Due to my previous miscarriage, I have to go for various HCG bloodtests every 48 hours to monitor the growth of the baby pending my first ultrasound.

Here are my readings

14DPO - 45

16DPO - 145

18DPO - 391

21DPO - 2063

23DPO - 3793 (Roughly 5 weeks 2 days)

It progressed well up until 21DPO, but didn’t double with the last one on 23DPO.

Do I have reason to be worried??