Question: This is me I’m a 18 year old girl

I have been sleep walking and talking for a long time. When I was younger it was horrible I use to try to hurt people and myself during sleep.
Some nights I would end up just in my bathroom of which I’m scared of so I never go in there. I had saw some weird old lady in my mirror in there rocking in a rocking chair saying my name and laughing so I had never wanted to go in there.My sleep talking and walking stopped in 7th grade when I had changed rooms. It has been starting back and getting worse since 11th grade.I just graduated high school and it is summer time. I usually hold long conversations nodding my head with my eyes open with people at night. I haven’t really walked in my sleep yet so far though. But now I sleep talk at 4:30 am every night. My eyes are always open when I sleep talk. Some nights I just make growling noises and sit up and pull at things and then fall back to sleep. Some nights I scream and cuss at nothing.But here lately I have been sleep talking in a kinda demonic voice and it scares my sister when she sleeps with me. Mostly I tell her I’m going to kill her and just stare at her all night with my eyes open. Just last night I lifted my head up looked at her and in the demonic voice said really fast to her “are you out of your mind” and as soon as I said that I fell down making a weird noise and just stared at her for 2 hours until I woke up to go to the restroom. Does any of you know what’s wrong with me it is getting so bad that my sister is scared to go to go to bed till 5 am!