Hi just noticed this post and wanted to stop by to say that you are a very thoughtful person. Not many guys would go looking for insight online to be able to help there partner or ex partner, so give yourself a massive pat on the back for that!!
If she hasnt already went to her Doctor that would be the first port of call. She sounds depressed 🙁 I would definately make that the first bit of advice to give her. Then her Gp could advise and help.
You have been through a lot with the sounds of things, be good to yourself also. Its easy to forget about yourself, but it is something that you need to remember. Chin up you are a good person 🙂

Take care and remember look after yourself 🙂