Wow, does she OCD much? [kidding]
Parents have a tough time with any diagnoses that their kids get, especially the kind that they consider to be something that they might have caused. In this case, it is all fear. As for being locked out, could you afford a motel? Do you have a nearby friend with whom you could stay? Neither option is as good as your own home, but they are better than sleeping in all-night cinemas.
After your assessment, and your mother returns, it seems clear to me that a chat with her needs to occur. You seem to know the basic facts about your diagnosis and its causes, so I won't try to put words in your mouth. But, if I were you, I would approach her with the knowledge that she didn't cause this, but she did complicate things while she was gone.
Good luck.