I don’t know what to do

Okay my mom is mentally ill and she also stays with me so yesterday we were talking and I was saying how it’s hard paying all these bills alone she helps with half the rent but she hasnt helped with anything else my sister was over her money till yesterday then she made me over it yesterday my mom says since I moved with you I been giving you 100 dollars a moment for lights and cable now obviously she hasn’t so I say stop lying and laugh and she went off started yelling at me outside and hitting me so we get in the house and we arguing now and I tell her don’t put your hands on me and at this time I’m on the phone with my sister not even talking to my mom anymore and I say something to my sister and she comes out the room and hit me two times in the head so I like slapped my hand in her face and push her face and she’s like you gonna hit me and hit me more I thought about it and walked away because I almost punched me like I never dealt with anything like this and I can she hasn’t been taking her medicine so she’s not sable right now