I don't know what to do.

I'm a 15 year old female. Basically this is my whole store. Around 2016- 2018 my sister had sever anger issues and mental health disorders and would black out and go in a rage, at least that's what she has been telling me. While she was blacked out the would attack me. She would wrestle me, pin me to the ground, chase me, punch me, and basically physically abuse me. Whenever I would attempt to confront her about this stuff she would get really mad and say it never happened and that she didn't remember it. I didn't realize that it was physical abuse untill about a year after it happened. She is 2 years older than me so as of right now she is still living in my house. I was talking with a new friend about what I had been through and she said she thought I had some form of physical abuse before. When I asked her what she meant, she said that one day my sister had confided in her what she would hit me. I was almost at the point where I was starting to feel not like a bottomless pit but that just drug me to the point of where I was 3 years ago. I was diagnosed with PTSD about a year ago and everything resurfacing is making me feel miserable. After years of people downplaying what I've been through as normal sibling stuff or comparing it to them teasing there younger siblings I feel almost like I'm going insane. via /r/abuse https://ift.tt/3n6WDHm