Mental health stigma

So I brought my little sister to the hospital on the 2nd of May 2021 for a suicide attempt. It seems they are ignoring her. When I got here at about 5 the emergency room was almost full and it is empty now and everyone is checked and assessed except for her. They are stigmatizing her and not putting her as priority because she attempted to kill herself. People advised me that paracetamol overdose is dangerous because it damages the liver and kidneys that's why I took her to the hospital. I am thinking to take her home untreated because it's pointless to sit her and we don't know if she will be treated or not. Mental health is a real thing and them as medical professionals should honor their aoth and treat every patient without prejudice.