Falling progesterone but rising HCG??

April • Pediatric/ Family nurse practitioner and mother of 3: Celeste (9), Aniston (5) & Abel (Angel baby 16 weeks).
Hey ladies,
I had my blood drawn last Saturday when I was 5 weeks and 2 days and my HCG was 2380 and progesterone was 26. I had my labs drawn again yesterday at 6 weeks 1 day (6 days later) and HCG was 17,600 but progesterone was 15.
I'm not taking both oral and vaginal progesterone supplements.
Anyone ever experienced this? Am I miscarrying? What are the chances that this baby will be okay? I'm so worried. I have an ultrasound next week at 6 weeks 6 days. Praying I see a heartbeat.