Answer: Post Traumatic Stress Disorder
Step-by-step explanation:
One of the symptoms of PTSD is being unable to confront the causes and effects of the events that traumatized the person so that they don't recreate the event itself.
Ginny is going out at night to avoid children as she does not want to think about the child she had lost and she is avoiding her parents as they are the ones who caused the situation in the first place. This points to classic PTSD.