Did you re-read your post? IF not I suggest you do it! Are you really willing to put your partner before your daughter?
How do you think this makes your daughter feel? Would not be helping the depression she is in. I am not scolding only observing.
Without judging, your daughter needs to talk to the doctor about her meds and then get to a therapist she trusts. If there are free services in your area and money is a problem all the better.
Depression is not something to fool around with, be wishy washy about or try to "wait out". It only gets worse left untreated. That includes talk therapy if warranted.
Put your big girl panties on and take care of your daughter! You can do this, you raised her, you can help her now.
Kabir says: "Student tell me, what is God? He is the breath inside the breath". from the poem Breath.
DX: reverse Trigeminal Neuralgia;Cluster headaches; Atypical face pain; raynauds;complex PTSD; recurring MDD,disassociative disorder;