Progesterone Question - Possible MC

Wondering if anyone else has had a positive outcome with a similar situation.

I’m 6w1d today. Had two previous miscarriages after a healthy pregnancy with my 20 month old son. I have been on progesterone suppositories and aspirin since 8/17. On 8/13 my HCG was 217 and progesterone was 22. On 8/22 my HCG was 9169 and progesterone 17.9. I started spotting bright red and having pea sized clots on 8/24 but it tapered off to just brown/pink spotting. The nurse told me I’m likely having a miscarriage because of the drop in my progesterone. Really hoping that’s not the case. I have an appointment scheduled for 8/28 and I feel gut punched waiting to find out, expecting the worst.