Need help stressing too much!!

So basically I'm 14 weeks pregnant and all my  mum does is ask me to clean clean clean everyone's mess like my sister she doesn't do nothing but go clubbing go out and goes college, I go college and i have a lot of work to do. If I say I'm not Gonan clean she starts shouting at me that if I don't wanna clean I should get out of her house because I im old enough to be pregnant im old enough to leave but I'm 17, my sisters 18 and she doesn't ask her to do shit and she's just stressing me all the time