You are a wonderful person and she will need support. Stay strong for her and research this disorder and it's manifestations as best as you can. It is incredibly difficult to deal with for her (it is for me) and relationships are hard when you are constantly dealing with mood swings and vicious harsh and crushing thought patterns. Plus her stress issues from her past.

It sounds like you are doing all you can. Maybe you should consider seeing a therapist yourself that has a lot of experience with her issues to help you cope??