Sorry you're living through this.

How old is she?

Also that she has a safe place to stay.

so not unexpected and probably deserved, tho feelings about what just happened are burdensome. You're entitled.

and I try so hard to control them and than something like this happens and I mess up

but undue controlling such is bound to result in blow-ups, NOT mess ups. You are human.

Many need help with such, and too few obtain it. Please do so.

It may be time to get back to it

and sounds like your sister + mother + you should be away from that horrid influence and obtain counseling.

Now wanting to pry, but why were you thrown out as well?
(You don't have to answer if you don't want to.)

after he tried to push me down a flight of stairs during an argument. He gave my mom an ultimatum either I'm on the streets or the three of us are

Couldn't afford to live on the streets so she put me out