In need of advice/ venting... sorry if it’s long( boyfriend with kids)

So me and my baby father live together first off, we have been together 1 yr 1/2 an I’m 19 weeks pregnant. So this past Friday we got into a argument because he has been slacking as a spouse an have been staying out late an coming in drunk, he always out and about with his friends an sister ( his sister is 42 an a party girl who leaves her 13 yr son in the house to do for his self have been this was since he was 9) but I’m home pregnant all alone with no company or support. So Friday I told him he wasn’t ready for this family life he is trying to convince me he wants, so I say we need space an I want you to leave. The very next day he calls me an say his daughter and son mom wants to know can he keep them while she goin to work, ( he has 3 kids already 14, 10 and 8 with 2 baby mothers) mind you the night before?!?! He doesn’t ask me to watch them til he gets home he just calls and say she said she’ll be there in 20-30 mins. At this point I’m confused and furious, so the kids come over and everything cool, come to find out she doesn’t have a job she only wanted him to get the kids because she wanted to attend pride weekend. 🤯🤯🤯 Here comes Sunday and his daughter doesn’t wanna go back with her mother, she tells her mother she wants to live with her daddy, he tells her ok cool, so Sunday night his baby mother an her girlfriend come over ( I’m in the bath trying to relax and process wtf is going on in my house that’s in my name, and I told him their problems wasn’t my business because that’s their child) so they have a conversation and the next thing I know I have a new tenant 🤯🤯🤯. Ok I was lost but don’t believe in putting the child in anything, fast forward to this Wednesday he gives me 150 to get her some clothes for the house because her mom took back everything she brought,, again I’m lost but to top it off sign over her rights, so we go shopping get clothes and everything ok again waiting on him to be a adult but instead I get a txt saying he appreciates me being there for him and her. Ok fast forward again to yesterday his 14 yr old gets kick out his mom house for being disrespectful and him putting his hands on her, his son is staying with his sister. But we only found out because we where there when he got there, so his daughter comes to me and say my brother wants to live with us and I’m like what. No!!!!! To put icing on the cake his son tells us he is having sex. Again 🤯🤯🤯 so this morning he said I seem stressed and he said talk to me so I tell him this is all to much and I have kids of my own( 2 boys and 1 girl my sons live with their dad and my daughters with me) am I wrong for feeling like he doesn’t appreciate or care about my feelings?!? And his 10 yr daughter is always crying bout something and always around to the point she knows to much for her age. She around as if she is the only girl in his life. Not to mention hasn’t or doesn’t acknowledge me or this baby the whole pregnancy. I have been getting headaches everyday since last Friday idk what to do.