Need some advice or someone to rant tooo....

So I'm currently pregnant with my 6 kid I only have Two with me I was 14 when I started so 3 are adopted! I have all girls to so I'm hoping This one is a boy... More to the point tho my Babydad he's the most selfish person ever its like he puts everything and everyone before his kids and I he's always running off whenever he feels the need constantly arguing or stressing me out on a daily basis I've expressed to him that I don't need the stress especially while pregnant.. And that I need his help around The house help with the two we have more he does nothing when he is around he barely helps . I've had numerous kids do this is starting to take a toll on my body I'm tired all the time and even more giving the fact I'm dealing with his bs and our 3and 4 yr old alone. Its like he doesn't get it what to do idk I'm terrified of having 3 kids alone I'm not financial ready either. He knows all this plus I still have yet to get a job and get back in school which I'm working on that now I'm hoping for the best but expecting the worst right now. He's so mentally and emotional abusive it's not even funny. All he cares about is his feelings and what he needs never mind how me or my kids may be feeling. I'm so over what hr does I cry all the time when he's around when he runs off I need even more help this is a every other day thing seems like it's not OK for him to just come and go when ever he please and leave me to pick up whatever pieces when he makes his selfish decisions.... Anyone have any words of wisdom ?? I'm at a loss hurt and confused.....