If she is actually bipolar, she would be the type with hypomania... .mild mania. But it actually looks more reactive than bipolar... .her moods are a reaction to what's going on around her and can flip fast or sort of build for a while, depending.
She sounds a lot like your d js... .I do think she is still pregnant and she talks/acts like she is planning to be a mom. She makes no secret of it, including posting photos of the ultrasound on instagram, so I really am puzzled by the tampons. I'm not ready to ask her though... .her answer would only have a slight chance of being the truth so there isn't much point.
I think she does get a rush from "getting away with stuff". She likes to pretend to be very responsible, very on top of things no matter what she's doing when I'm not around. It's why I was too late figuring out she wasn't taking her pills correctly, she said of course she takes them, if she misses a day she spots for a month amd its a pain. But... .no, she wasn't taking them regularly at all.
So... .i love her, but I don't trust her. And I'll enjoy the calm while it lasts best I can... .
Except for the worry about what's up or what's waiting. Better that than actually being IN crisis!