If it truly is depression then its going to be a rought road, there is no denying it, but you can come through it! My H was the same, he lost alot of weight was barely eating and his sleep patterns were all over the place. If she will get help that there are bound to be some improvements, she will need to see either the family doctor or a C that prescribe medication. She will need to be assest. Also I would say that you should definately consider getting some IC yourself, you are having to deal with alot to, and its good to be able to get that out to someone. I know how you feel, this is such a hard thing to stand by and watch your wife go through, all we can be is supportive, without really interfereing, just let her know you are there.
Me - 44 H - 44 M - 19yrs together - 23yrs D16 S8 EA/PA - Bomb Oct20/06 Jan 8/07 Feb 01/07 Jul 15/07 H still @ home Recovered!