I am about to freak out

My mil will not listen to me. My daughter was sick and my is only 7 months and she was trying to give her tea, baking soda and rice water. I told her no but she will not listen. My husband said I was being a bitch because I would not let his mother do that. When I went to the children's hospital so she could get fluids because she was dehydrated because of my mil giving her a lot of baking soda. They told that is why she was dehydrated. I told my husband and he does care. I left his ass now. I will not let you and your mother kill my daughter because she believes what she did is right. Then she rubbed olive oil all over her. I packed my shit and left.