Pregnant/due tomorrow with partner who drank w/blow up today

The mask has fell. The secret is out. I am with someone that has a drinking problem. He changes sometimes for weeks or a month at a time but slowly goes back to the same behavior. When he is not drinking he replaces with video games. We have a 1.5 year old toddler and I am having our 2nd child tomorrow. I am scheduled for surgery in the afternoon. He drank last night and was condescending and disrespectful toward me while I was designated driver. He is combative/argumentative and obsessive raging these last 2 days. He drinks and drives. We had a big blow up when we got home last night but I kept my cool. We were able to go to sleep and squash the incident and he told me he would stop drinking. Then today, he went to the bar from 12pm-4pm and we went to his family's house to say goodbye to relatives leaving- and he brought back up the critiquing of my driving and was the same way about our argument yesterday and he wouldn't let it go when I told him I just wanted a pleasant ride home without argument and stress. I felt it was a deja vu from yesterday and I immediately just said-I can't do this anymore. I got my toddler out of the car and he started walking and he brings all of his young children nieces and nephews outside and tries to get them to get my toddler until he eventually rips my toddler out of my hand. He runs inside with our son and I'm big as a house pregnant trying to get my son back as he is yelling at me that I'm crazy-Yet he has been drinking out of control the last 2 days. He screamed I'll never see his family again and I'm out of his life. That's what I should be saying you selfish son of bitch. I cleaned all day while you were at the bar all day drinking.

His sisters came out of house--yelled at him and were supportive with helping me. my partner and I are both in our 40s. I just can't believe this. I'm going to a csection tomorrow without my partner. We have worked so hard for this family and alcohol is dismantling it. I just can't believe he won't be there. I won't ever forgive him for this.

If you were in my situation-would you let the alcoholic partner of your child in the delivery room with you?

I'm so done. He is so selfish and in my pregnancy and motherhood state, he doesn't give 2 shits sometimes about my wellbeing. He only cares about himself. He knows how to give a good speech about wanting to be a better person for me and for kids--and halfway tries until we are back here. I hate these cycles