in full sobriety, she's probably already pretty squishy with ideas about "the universe" and tarot and shit like that, in addition to being a complete moron. Common circumstance where a girl is attractive growing up and no one disabuses her of her absurd notions because they all want to fuck her.
My guess is hardcore depression or anxiety meds (e.g. lithium or high-dose whatever else) coupled with a few glasses of wine and no little to no food (increases effects of alcohol). It's not so much the crazy shit she's saying, but her spacey-ness and lack of focus.
Could be too that it's severe ADHD on NO meds, coupled with being a moron as I described above.