If she has been diagnosed with something and needs a treatment, she has to want to go get it and get better. You admit that you have become obsessed about fixing her problem so don't.
Don't suggest anything. She will do what she wants to do anyway and will resent you for trying to talking her out of her plans.
Your sitch is not hopeless. There's still hope. But you have just started and should know that you have a long way ahead of you. Don't even bother counting days wondering how long you will have to continue 180/NC, you'll just drive yourself nuts.
You are probably still in a withdrawal period but hang in there, it will get better. Detach. Focus on yourself. Be patience. I know it's hard but hey, that's the only thing you can do right now.
