Please advice no judgment

Okay ladies I’ve been with my husband for 7 years married two years out of the 7. For the past couple months he’s been being really different. We have a 5 year old and a 3 year old together. He’s been telling them that they are annoying, sometimes he will tell them to shut the f up, he will tell them to stop being f****** retarded and to stop being an f’ing baby etc. when I tell him to stop he tells me to shut the f up but then he could turn around and he the sweetest to them and will do something with them. I just don’t want them to be emotionally traumatized from they’re own father. Whenever I go to do something even if it’s with my parents it’s why do you got to do that or you don’t need to go that’s stupid. When my phone vibrates or rings it’s who’s that? I don’t like that person so don’t be they’re friend. You don’t need to go there with them etc. I had a molar pregnancy a couple months ago & had a d&c to have it removed. I have been going through boodwork every week since. He tries to touch me and when I don’t want him to touch me he gets mad but I’m afraid to do anything still & I don’t think he understands. I’m a stay at home mom & I have no money saved up at all. I don’t get along with my step parents to move back in with family. I can’t afford daycare if I would move out and I’m just really stuck on what to do. I don’t want to stay and all of us be miserable off and on because he’s like this and then he will turn and try to be the sweetest person but I don’t want to leave because I’m scared & don’t want to split the kids parents up. Please any advice is greatly appreciated.