How do you handle the sadness of separation

I feel sad & kind of blaming myself for overreacting but I had to stand up for myself. My H has been verbally & emotionally abusive & this has escalated since I got pregnant. I have noticed the disrespect has just gotten worse as he is convinced that because I’m pregnant, I need him. I have tried to keep the harmony until I give birth but things became unbearable on Saturday night when he scared me in my sleep out of spitefulness. I felt the shock in my stomach. When expressed how I felt about the situation, I was quickly dismissed & that left me do angry. The next morning he started insulting me & calling me names because I pulled the blanket as I woke up ( I was angry from what he did the night before). Anyways, the insults continued & I couldn’t bear anymore so I asked him to leave. Things escalated quickly afterwards but I left as he was packing his stuff. I knew I wanted to leave the marriage after the baby is here but I feel I fell for the bait. I thought I’d have a peaceful night afterwards but I barely slept as I was overthinking about what just happened. How do I manage my mind? I texted him when I calmed down to make him realise the consequences of his actions but there’s been no response. P.S: He never takes accountability for anything which drives me mad.