AITAH for cutting my twin sisters hair?

Posting here since it was removed from the other AITAH since someone reported it as a revenge story when it isn't AT ALL!

I (16f) have an identical twin, Daisy (also 16f lol) We grew up apart since our parents had a rough divorce when we were 7 and I ended up going with our dad and she went with our mom. (We have no other siblings.) A month ago, our mom died so she came to live with me and dad. She has been obsessed with being the same as me ever since. She bought exact copies of some of my clothes / outfits and would wear them the same days I put mine on to match, and cut her hair from the bottom of her waist to slightly above it so it was the same length as mine and styled her hair every day the same way as me. A week ago, she started pretending she was me to people at school like my friends and teachers and tried it with dad too. It's driving me insane but dad said to leave it since she's grieving apparently.

I had a break down and dyed my hair pink the other week. She dug through the trash and found the packet I used to dye my hair and bought the same hair dye and dyed her own so we still had the same hair colour. I then had my second break down last night, I couldn't take it anymore. I went and cut her hair.. I snuck in her room when she was asleep and cut her ponytail from above the hair tie so it's pretty short now. I left her cut off ponytail on the pillow next to her head since I was in shock I did it then I went to bed in my own room.

I woke up early and got ready for school before Daisy or my dad got up. When she woke up and was freaking out and my dad is so mad at me. They were screaming at me but I just left for school and blocked them both when they started calling me. I'm still at school now and I am using my data to post this, I feel like I messed up but I was having a breakdown and didn't want her to copy me or pretend to be me anymore and I knew if I cut my own hair she would just cut hers too to match. I don't know what will face me if l unblock them or go home. I blocked all my family too for in case my dad tried to get them to call me. I feel like I was pushed to a breaking point but she was crying a lot when she woke up with it so now I feel bad. AITAH?? I haven't told any of my friends yet and told them Daisy was sick and that's why she's not in school too since I can't face it.