Frustrated don't know what to do

Yanet
So my fiance passed away 6 months ago and I had to move in with my mom and stepdad as I was practically homeless with a 7 year old and pregnant 26 weeks. Well my daughter is now 3 months and im saving to get an apartment. Well my mom and my stepdad aren't in good terms and called it quits after 24 years. Well the plan is that my mom is moving in with me, well the stressing part is that she has 3 kids of her own a 12 yr old a 6 year old and a 5 year old. I will be the only one working and pay is only 11 a hour. And one of my biggest concerns is that my mom doesn't treat my 7 yr old daughter as good as I would like her to, she can't even go to the living room as she will get yelled at and sent to her room (which we share) and my sisters always remind her how this is not her home so she can't touch or eat this and that. Well we haven't even moved out yet and my mom has mentioned how things are going to pretty much be her way. I don't want to argue with her so I stay quiet. I'm scared to move to my own place where I will be the one paying and still have to be stuck in my room with my daughters 24/7. I mentioned how I would be getting my husky back and she said well that husky is staying in your room.. I got so mad. It will be my place and my husky won't be able to be in the living room? My mom has always taken care of my kids so I save on child care and I love her She's always been there for me in her own way. That's why she wont be working. But I'm going crazy here. I'm sure I can make it on my own with my 2 daughters and even my mother, but 3 more kids whom are very rude and controlling and don't let my daughter play with their toys, but they do come and play with my daughters toys. Idk just a rant. I'm so tired of how everything is going downhill for me.