a) awesome b) awesome again for making that call in general. that is really scary and brave c) good luck!
I really don't think they'll keep you that long, if only because (and I know this may not inspire confidence, but I think this is a big thing) they're stretched too thin in terms of money and staff. I'm pretty sure the minute they think you're okay you'll be released.
And I think they'd be understanding. So long as they think you won't hurt yourself or anyone else they'll release you. If you seem willing to take medication and possibly attend therapy, I think they'll be willing to allow you to check out. I know for an actual suicide attempt they often keep someone for five days, but you didn't attempt suicide, you're pro actively seeking help, and I definitely see a difference in those two scenarios.
You're a really brave person. One of the hardest things in the world to do is to acknowledge when you need help. I think it's amazing that you're able to do that!
If you think about it, one of the things you're responsible for is your own body and life. Taking yourself to the hospital because you're feeling that suicidal demonstrates responsibility and care for yourself.
I think so long as she's reasonably certain you'll go, she won't force it. Just make it perfectly clear that 'yes, I actually am going, I just need to do a few things first, I have someone waiting to take me, I've braced myself, etc.'
In my experience the first week is usually just kind of easing in to everything, so I think catching up won't be too bad.
enh, i know a lot of people who cut the first week of classes intentionally. it's not great, but it's not the end of the world. plus if you can contact school ahead of time, you can get notes from teachers/classmates and stay abreast of the class, rather than playing catch-up later (or even follow along if there's a syllabus posted online, since i'm not sure how your school does it).
fucking hell. That sounds so awful. D:} Witnessing, and I hope that the note works and you never have to do that again. hugs if want