Going efffin nuts.

I love my boyfriends family and him to death but I'm literally about to lose my shit. Long story short I have to live with him cause my mom put me out for getting pregnant at 19, I'm not from the country so I don't have any family to stay with. I live with him, his sister, her boyfriend and the sisters 5 year old son... They are all 23+ years old. I find myself cleaning up CONSTANTLY after EVERYONE. And this past week I decided I wasn't going to clean the kitchen and this is the outcome... the living room and dining room are even worse. I literally stay cooped up in our bedroom all day because it literally disgusts me. The bedroom I have to clean every day because my bf is a slob who just throws his shit everywhere all over he floor and leaves his cups and plates all over the room. At this point I rather be freaking homeless than deal with this crap anymore. I really need some advice cause this just isn't working, I'm 8 months pregnant by the way!