Sorry for your loss.
I've been reading so much about when it's okay to start TTC after a MC and it's always something different. My dr told me wait 1 cycle (but I never asked why) - I've read that you're told to wait 1 cycle for dating purposes. One of my friend's - her friend - got preggo before her 1st AF after a mc and she had a healthy baby.
I think if it's meant to be, it's meant to be.