D.B.
I checked your prior posts, and I see a big swing in your viewpoints, from wondering if you should intervene in her personal relationships (as if she were a child) to having her Google her own rehab programs (as if she were an independent adult).
I'd stay away from trying to diagnose her by deciding how much to weight her reaction to the loss of her grandmother to deciding the specifics of her underlying reason to take pills to feel better. Yet after that, you let her decide to stop therapy. That's not a child's job - that is a decision made by the parents and the therapist together, although certainly the child can be included in the discussions.
Your daughter should get into a serious therapeutic environment. That's not something she should be Googling herself. That is something that should be made in discussion with her doctor and her therapist (yes, even the one she stopped seeing). You MUST take charge here and not have her making these decisions when she is into drugs and psychological pain. Talk to her doctor TOMORROW and find a program that matches her SYMPTOMS (not your diagnosis of what she needs or what caused it), and find out what's good and what's covered by her insurance. You can tell the doctor that she had conversations with the counselors at a specific program, but get an appointment and go in and talk to the doctor immediately. Get her into a program as soon as possible - probably residential would make sense, but that's up to the professionals as well as what the availability is.
Stop trying to treat this yourself or understand her relationships or whatever. She's not able to control herself and you have to step in now.