System neglect

I’m Sage, 18 F. I was in foster care at 17 with a foster mom who exaggerated a lot and her fiancé tried to stay out of it. I got pregnant by the foster dad’s cousin (36 y/o), who was abusive and neglectful. At my high school I kept fainting, “seizures,” high BP, freezing—nurse said I was faking, teachers and students tried to help. After turning 18, a doctor finally diagnosed POTS (postural orthostatic tachycardia syndrome) and confirmed the pregnancy. I want to know if I can take any action about the medical neglect from the school and the system.