Single moms of 3 under 3?

I may need to leave my husband. Im pregnant with our 3rd and will have 3, 3 and under when this one is born. I have pregnancy depression and when I told him and told him what I need to be able to manage without meds it became a fight blaming me. I was looking for compassion but it just became a huge accusation that I get all this leeway and he gets nothing and if he has to watch the kids for an hour instead of working on the house every day then I cant watch TV or be on my phone ever. How did I get in a marriage with someone who has no compassion and is so selfish? Can i survive being a single mom of 3 under 4? Financially I'm fine...I'm the breadwinner...sanity tho...will i have any? I'm terrified to even start the process of divorce.