<human>: Give me the gist of the text in a nutshell

Ok, so I've posted before about introducing my SO to my parents, and about a sketchy dude who apparently wanted to get in my pants via the internet, but this one is about my best friend in the whole world.

Back story:
She and I have known each other 2 and a half years, ever since we were randomly assigned roommates freshman year of college. We are now juniors and live in singles right next door to each other. She has a history of eating disorders and self harm, and after a year and a half of me telling her to, is now seeing a psychiatrist and has prescriptions for anxiety and depression.

She recently broke up with her boyfriend of a year (M20) and is now dating a new guy (M29) (Not sure if this is relevant, but hey, it's a recent change in her life).

Current situation:

She's recently run out of drugs and won't be seeing her therapist until Thursday. The only person she trusts enough to talk about this to is me. Over the past two days I have had to counsel her through panic attacks and freak outs where she is convinced she is a burden on me and worthless. I've noticed that her wrists were in bandages and asked her if she wanted me to take her knives away, she said yes and they are now hidden in my room. 

Basically my question is, how the hell do I get through the next four days until she can see her shrink? I have exams and papers to write, but I'm terrified that she's going to do something...stupid and I don't know what to do. 

This girl is my best friend and I'm pretty sure I'd go to pieces if something happened to her. I love her too much for her to have an accident.

Also, it should be noted that she has tried the counseling services provided by the school and hates them. She only talks to me or her therapist. She won't even talk to her parents or sister cause she doesn't want them to think her crazy.
<bot>: My best friend is unstable, doesn't have access to her drugs until Thursday, and I need to know the best way to approach her and keep her off the ceiling until then.