Oh dear Houseller, you're in one of those places many of us will have been, with so much big stuff going on in life. I'm sorry to read about your partner and hope the treatment is effective.
I don't want to make unhelpful suggestions but, here goes. Would it be possible for your daughter to take a break from her work, tell her clients that she has health problems and has been advised to rest. I know getting any kind of incapacity benefit these days is a trial but her involvement with the mental health team may help with that. It sounds as though your daughter has been unable to work consistently, if at all so her clients may prefer to know she'll be unavailable for a period, rather than cancel at the last minute.
Do try not to lose sight of yourself in all this.
German voters slide inexorably to common sense …



