CFS is the American name for Myalgic Encephalomyelitis, the most exhausting disease known with relentless pain all over. Depression comes from people disbelieving and I can see your daughter, her family and you are going through a nightmare now. First, the more your daughter pushes herself the iller she will become, she must have help from somewhere to look after herself and keep the family together. You all need support, not from the psyches, from people who can give practical advice to cope with things now. It's unlikely the ME will be cured, it can get into a remission if she gets sufficient bed rest when she needs it. She needs a good doctor to ensure there are no other treatable illnesses lurking beneath her devastating symptoms. This illness affects whole families, it usually strikes suddenly and you also need as much help as you can get now . All best wishes