Can I choose my own custody?

My dad is a narcissist. He denies me any medical care because he thinks, as a chiropractor that will fix everything, I have some sort of vaginal infection and my refused to let me go to a doctor. He claimed he would disown me if I went, and I told a teacher who mandate reported me. My principle called my dad saying if I’m denied medical care it’s neglect and he would have to call cps. My dad played along with it just to get very very mad at me and saying I cant go and then switching the story to how I have to go immediately. My mom is suing for medical custody since their current divorce agreement is they both have to agree before doing anything medicinal. My mom said to show my principal the texts between me and dad because it will help her get the mc if it is documented, but I just think he will find out and take it out on me. What do I do?

Location: Michigan

Author: Gial86