Are you ok today? Are you and baby safely with mum yet? That's the most important thing - getting away from him. Getting to safety.
In the shocking aftermath it's so hard to think clearly and take action - but it's essential. Do you have family & friends to rally round?
Have you contacted the police? This is classic escalating behaviour and it always starts with something that gets worse, as so many women here can testify. They need to have a timeline and evidence.
Did you photograph your face? It's evidence.
A doctor's appointment for both if possible - they can confirm bruising etc and check baby's welfare.
Thinking about rights and property is hard, but - do you own your home? Rent? Mortgage? Who pays what?
If it's mortgage it's complicated and it's wise to get professional advice.
He will do one of several things:
Act as if you don't exist and block you and baby out? Remember you have a right to child support.
Beg, apologise, promise, cry? Worthless. You've seen his true face and the mask WILL slip again if you believe him and go back.
Turn nasty and threaten self harm, harm to you or baby, insult, lie, DARVO (deny, attack, reversing victim and offender), gaslight (it was all your fault, if you hadn't ... I wouldn't have ... I didn't ...)? Write out what happened, starting with your posts here and refining them. Keep all evidence, screenshot emails, texts, posts of any kind, record phone calls. Evidence for the police.
Go underground and spread lies to family and friends and colleagues about you? Get there first - ensure everyone knows why you have removed yourself and baby to safety to escape him. You'll need your network.