Soon to be single mother of 3

My husband went off on me again about how much of a worthless piece of shit I am cause the house isn't immaculate and told me he's filing for divorce. I am a stay at home mother to a 2yr old and a 4yr old who is beyond hyper and lately has just become an absolute disaster that I cannot deal with anymore. Plus I am 7mths into a high risk pregnacy and could go into labor at any second. But I have to keep the house spotless, take care of every chore, feed and clothe everyone, take care of all the animals, keep up with all the finances to make sure everything is paid (which is hard when he blows through money like it's an endless supply), take care of all the shit having to do with his legal issues to ensure that his ass doesnt go to prison for the next 10+ years. Yes he is the only one that works but his checks reflect that he has not been at work as much as he claims he is and he is a supervisor so all he does is sit on his ass while the other people do the actual work. In fact he is supposed to be at work right now but I logged into his FB messenger (yes I know I shouldn't have) and saw a photo of him out drinking (a whole pitcher to himself) with his buddy tonight even though he is on probation and not allowed to drink or even be in a bar. Half the time when he is off he is out partying (hence the legal issues) instead of spending time with his kids and the other half he is in bed sleeping for 12+ hrs. I know I'm better off without him in my life but unfortunately I am stuck with him the rest of my life due to the kids. I am all for a divorce(which is saying a whole lot since I don't believe in divorce) but wasnt going to file until after I had recovered from birth and could find a job that could possibly support myself and 3 kids (who would need childcare so that I could work) and pay all the bills as I know he will not help out with anything other than court ordered child support and I have a strong feeling that as soon as he is free from "my control" (aka me saving his ass time and time again) he will go out and get into more legal trouble and be locked up therefore leaving me completely on my own to support these babies. He will cut all money as soon as the papers are filed so I will be sol instantly as he has blown through the emergency fund time and time again and even just temporary child support could take months to be set up. I already know the divorce is going to be nasty he'll fight me for half of everything which Texas is a 50/50 state so even though I paid for all the property and vehicles he very well could take half of it all. I'm just so sick of this I can't take anymore. He wasnt like this before he was a good man and an AMAZING father was always kind of immature but instead of growing up he seems to have gone entirely the opposite direction lately. I grew up without a dad in my life and I know how badly that can mess someone up so i have fought so hard for this marriage but at this point it is WAY beyond toxic. All I can hope is that he someday gets his shit together and can be the daddy that these kids deserve. I'm just so scared about what the near future holds as I already knew the first steps would be rocky but they were suppose to happen after the baby came.