Will My Old Mental Health History Be Used Against Me? (mo, Usa)

Location: Missouri. My ex assaulted my toddler and me (with our newborn in my arms) and was charged with child abuse and domestic violence. He was deported before the cases could proceed.

I filed for divorce with an attorney. My ex filed a pro se motion asking for a time extension, guardian ad litem (GAL) appointment, and psychological evaluation of me. He claims I am severely mentally ill and overreacted to him pushing our toddler, causing me to act erratically and almost drop our baby, which made it necessary for him to use force on me. It's absurd and entirely false.

In the motion, he misrepresented and lied about my history. Among other things, he said I am suicidal and referenced self harm scars on my arm.

I have never been suicidal and have never tried to commit suicide. While dealing with anxiety and difficult life issues about a decade ago, I self harmed as a very poor coping mechanism. I have never done it since and have not had any mental health struggles since before my children were born. I'm currently in therapy to make sure I'm always giving them the best version of me.

My lawyer said the psych eval request is likely to be denied but that a GAL could be appointed. How worried do I need to be about this? What can I expect if a GAL is appointed? Will they obtain my medical records, etc?

I'm terrified for my kids' safety. Not only did my ex assault us, he has a history of DV with past partners, had a child taken away permanently by foreign CPS for neglect, committed international child abduction, is a convicted felon, the list goes on.