girl has a nervous breakdown

My girlfriend has already had a nervous breakdown for a week or something like that, some kind of mental or nervous disorder, or depression, I don't know ... I can't understand. He does not want to see anyone on calls, even mine does not answer, does not go out. I can’t do anything with her, and we didn’t swear so that she would freeze from me. What to do how to return her to the real world? Later, time only complains about life and whines about how bad it is for her to live (there is no reason for that) that she hates people all around her enemies ... damn everything was ok and she was so rarely overwhelmed. What could it be? About the psychologist and does not want to hear, says you enemies want to hand me over to a psychiatric hospital. I'm powerless, it's been freezing for a week