Do I have a chance?

I’m on my 5th FET with high quality euploids and have gotten the furthest I’ve gotten so far with this transfer (full immune protocol + lovenox and baby aspirin and they cleared some uterine adhesions that were likely there for my prior 4 FETs)

I know my beta progression is not good but my doctor wants to keep monitoring me.

8DPT: 149

11DPT: 377

13DPT: 558

15DPT: 731 (was about to stop taking my meds here)

18DPT: 1561

On 15DPT my RE saw a gestational sac

on 18DPT the sac grew a bit and they saw a clear yolk sac. They’re having me come back for 22DPT to check for additional growth.

I am prepared to miscarry but curious if anyone had something similar and made it through. This is also secondary infertility which makes it all more confusing. Thanks for any insight!