My father was severely bipolar - behavior that looked like paranoid schizophrenia when high, crippling clinical depression when low, and when I say 'crippling' I mean delusions of physical disability and paralysis resulting in the inability to get out of bed for weeks at a time. So believe me, I can more than sympathize with what you're going through.
This was many many years ago and the meds they had then unfortunately did not work all that well for him. But things have changed and in many cases bipolar disorder is manageable IF one gets the necessary help from those qualified to make a diagnosis and recommend/prescribe treatment.
I would not be surprised if she fears being labelled in the process but it's a treatable illness like any other and if it goes unchecked there are likely to be much worse "labels" that could come her way from those who do not care about or understand the situation. If she really is bipolar or something similar, it's not going to get better by itself and will probably get worse, which would be a tragedy for her and everyone around her.
Can't say much more than to echo Sky's words above about getting help from a qualified professional in both diagnosis and treatment. I wish you both the best.
