Sometimes teen behavior can mimic things, from textbooks.

Careful with labels, just accept her actions were behaviors you won't tolerate and move forward, into adulthood.

Push/pull, lashing out, manipulative behaviors, at that age can just be maladaptive coping skills that aren't fully defined, as identity discovery is still in play. Like toddler tantrums, that are eventually learned as ineffective, as are teen outbursts in social contructs.
See how she is, close to 40, and see if she ever received an official diagnosis. Maybe she will, maybe she won't. Threatening suicide is different than serious consideration. It's maladaptive.