My girlfriend, who I love with all my heart is splitting and is alternating between depression and rage. 

Initially she experiencing dysphoria and feeling negative thoughts about herself. That turned and for the last four days she’s  been projecting a lot of her negative feelings on me, and blaming me. 

How can I get her out of this state? What can I do to help her? She’s was doing really well for months and had not split for months. Now it’s chaotic and in crisis mode.