deli, you're doing great! I know it doesn't feel like it, but you are. Moving is a huge stressor, any move is, and this is a HUGE move for you, emotionally. I think all the thoughts and feelings you're having are so understandable I just want to hug you and say of course you feel that way!
I'm sorry you SI'ed but, again, I understand it.
Tree was so right on with what she said about seeing p-doc that I don't have anything to add there, I hope that's an option for you, if what you need is to be w/pdoc for a while I really really hope you can do that.

also, about the room, try not to feel guilty! You guys flipped a coin, right? So that was chance, not you. Just take the room, be glad you got the one you wanted, and if your friend won't let you pay extra but you REALLY feel like you should do something to level things off, then maybe you could so something else for her? Like cook some meals or buy her something she likes for her room, or her favorite food, something that will make you feel like you evened things out a bit?