I wonder why the doctor can't help you do this. If you're "supposed" to go... the doctor who says that needs to assist you in that.

But truly those with DID don't do well in any locked up situation...nor might they do very well in a group setting of living.

Since school is beginning again, can you locate the school counselor's contact information now, and maybe also schedule a visit? That way you'll have something to look forward to for help, and that may make these days less troublesome.