Ttc after miscarriages

Nakia • 30 Had 4 miscarriages over the last 7 years. 2018 happy accident lol due November 2 hoping for my rainbow.
I'm 28 married for 5 yrs, ttc baby # 4, 3 prior miscarriages(miscarriages are 2 yrs apart)  Has anyone had multiple miscarriages back to back? If so how many before a successful pregnancy and what was done?