I'm a bad mom

My autistic daughter 5y, keep hitting me. I'm hiding in the closet. She don't hit her older sister or dad just me and her youngest sister. I try restraining her. I end up getting hurt most time. She would use her leg or throw her head back. Writing this causing me to cry.

She is in the room looking for me but I know once she see me, she start hitting me. I'm pregnant which might be a factor but she was always hitting. It just start getting worst. I have seen her grab her younger sister (2y) in a choke hold.

I don't know how to cope with her most day when she act like that but to hide or separate myself. I take care of her mostly when home than my husband. I even sleep with her so she would stop making a fuss to sleep.

I though being closer was helpful but now I don't know.

She seem to stop crying. Thankfully but what can I do?

*To add, she was in ABA till last month. The instructor info me due to the virus, days can be miss then last week, I was told she was discontinued. I'm on the hunt to find somewhere else*