stressed how can I reduce it

I'm going thru a big divorce fights and stress with my ex husband who acts like a "father" Monday thru Thursday but on weekends he's out acting like a single man. All I ask is for support and spend more time as a "family". But it's to much to ask. I'm tired of stressing, I'm moving on from this marriage thank god! But I'm getting scared for the baby. How can I relax. I don't want to hurt the baby this is my first time being a mother 😔. I don't care for him anymore