I would question the diagnosis of BP based on your descriptions. I would suggest that a diagnosis of BPD (borderline personality disorder) is more acurate. In reality - it doesn't make that much difference, meds for BP can help BPD and therapy for BPD can help BP, and the features are really similar (at least on paper....)

It's just the major focus for BPD is on therapy, so much of what causes her problems is about her ability to deal with stress, to deal with life and her self image and this would be best addressed by therapy.

Of course, she would have to make the decision to want to get better, and only she can do the hard yards to make it work.

Agree with the anxiety -> vomiting thing, my mum and grandma both had that.

Best of luck to both of you. (btw - some times you have to be cruel to be kind, good on you for making her leave when she was misbehaving, you deserve to be respected in your own house.)