How do I help my girlfriend who is suffering from the voices in her head?

Me and my girlfriend know each other for over 2 years now, we started as friends and recently started dating from January this year. She told me about her past which was very traumatic and how she had wanted to take her life multiple times but failed. We were doing well with each other and I thought I could finally help her get over her past until yesterday, when she was very quiet. So I tried to give her some space, and then she opened up about the thoughts in her head. She said she can't take it anymore and wants to end it all. I somehow convinced her not to do it, but I really want to help her, and I seem to be lost as she keeps saying there's nothing I can really do to help her.

She has suffered a lot in her past because of bullying, and her family circumstances don't seem to help at all. She took 9 hydroxine pills last night to fall asleep. I really want to help her. So please, if anyone has any tips, it would be really appreciated.

How do I help my girlfriend who is suffering from the voices in her head?
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