My Mental Illness Is Turning Me Into Someone I Do Not Recognize. I Used To Try Be A Very Kind And Empathetic

My mental illness is turning me into someone I do not recognize. I used to try be a very kind and empathetic person but now my first reaction to any situation is not to be kind or empathetic. It is anger, being mean and a horrible person. There is so much anger and I don’t know where to put it, don’t know what to do with it, how to deal with it. I’m scared of the person I’m turning into because I do not like her way more than my older self who I already hated