Have you told OWH no more contact and blocked his number? You don't need to be in the middle of some crazy adolescent pissing match-you're pregnant and have a baby on the way.
You know some people only feel normal when there's drama involved. Back away and have as little contact as you can with H.
Boundaries are your friend.
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss