I hope everything works out for you, what a sad story. Your poor girlfriend. I think those anti depressants are dangerous drugs, there are posts here on curezone about people getting off of them.
Another thing I found at curezone is this tapping website: you can do this by yourself, and your girlfriend can do it too if she wants, you don't have to go to a therapist. . Here is the webwsite, http://www.tapping.com/videos/overcoming-depression.html
I use to go to a therapist who did something called emdr, that cost $60 for 45 minutes but this is free and it's similar.