Is there anything I can do to get my crazy roommate out sooner?

In the last few months one of my roommates has gotten very unstable. She is a total slob and I often find hidden bags of trash and other unsanitary things. If anyone asks her to do anything she starts screaming. A few days ago our third roommates hamster escaped and my crazy roommate started shrieking with terror at 3:30 in the morning claiming that it magically came through the wall and then followed her into another room (again through a wall with no cracks). Now she is hold up in the living room. She refuses to sleep in her own room (or even go in there for more than a sec.) because it is “tainted” by a hamster being in there. Its been four days now and she has turned the living room into her new bedroom. If anyone says anything to her she just gets super defensive and starts screaming.. We are getting rid of her at the end of the month, but do I just have to live with her craziness for the next three weeks? Is there some way I can reclaim my living room?