Marlie, I so understand how you are feeling. I only have one child, and all the dreams for my little girl, just gone up in smoke. What helps me is to separate my daughter from my daughter on drugs. Not always easy, however to dwell on her actions, behaviors on drugs would just tear me down.
Hopefully, your daughter will go to a sober living arrangement. I'm sure that would at least ease your mind.
Praying for you & your daughter.
Chris