Spotting

Alison • 36 • married • 👧🏼 9.9.18. • 👧🏼 6.12.21 • baby #3 due February

So this morning I had some brown spotting on my tissue after wiping. I'm on 400mg progesterone after finding low progesterone levels. My HCG according to betas had a 36 hour doubling time. My last us they saw the sac and yolk.

I'm 5+2 today and just feel like this is the start of another miscarriage.

Any advice? Has this happened to anyone and either had a MC or went onto having their baby? Basically should I be preparing for another miscarriage.