Pregnant after 3 miscarriages 😬

Hi ladies. I am unexpectedly pregnant after 3 miscarriages. 2 blighted ovums and 1 chemical. I was in the process of waiting for my next cycle after my recent miscarriage to do recurrent loss testing. I went to the doctor to confirm my hcg was 0 and they found it was 197 and that I am pregnant again. My husband and I had unprotected sex once so not a total shock but we were a bit surprised. I want to be so excited but I'm nervous of another miscarriage especially not knowing what's wrong. My husband went through testing and everything shows normal on his end. I have no idea what could be wrong and am praying this is our rainbow. Anyone had multiple miscarriages that were unexplained and had success?