My 17yo sister called me spoiled. She doesn't know how hard it is to be 23

I was worried about mom's mental health and just wanted a safe place for me and sis so i putted some Bach flower remedies in mom's water. Really few. Yesterday mom got home and said "idk what u are putting in my water but i have never felt so miserable, i can't drive, I'm mad". I got scared and told dad to drive me to my accommodation today instead of tomorrow. I went out and eventually mom calmed. I calmed too because i thought "she was just hungover, these are harmless, also she drank a lot of liquids and they couldn't have harmed her, she's just using me to hide she's hungover. Her drinking milk instead of beer rn is a proof". So today all day im losing my mind why am i going to my moldy accommodation and mom's at work till 8pm, i could do my game event on sis' laptop because mine doesn't work and because my accommodation's internet is stopping. It's moldy. I jinxed myself. My sister got mad and told me i poisoned mom and she was barely driving (mom avoids driving before i even had remedies) and then she went to the gym leaving with the words "you're spoiled". Sis even thinks mom hit her because of my remedies. I protect her and mom abuses her and she's still on mom's side.She got everything she wanted. I grew up in poverty in post communism. She's 17 and think she knows it all but honestly there's a big difference between 18 and 21. She thinks of herself as a big deal because i took all the bullets for her. And now when im bleeding, she calls me weak and spoiled and says i should get a job.

Everyone is telling me i should move out but i just can't take care of myself and a place. Also im used to home. The vomiting at the sanatorium and the sprained knee killed my independence. The mold in my accommodation burried it. Idk what i will do with my life. Being in your twenties is something she doesn't understand