Welcome dazed
It wasn't just about mood swings, lying, unreasonable demands - she actually started to invent conversations / scenarios that hadn't happened. She would even swear blind that a scenario between us had just occurred even thought nothing of the sort had happened. Has anyone else experienced this?
Yes, to a PWBPD feelings=facts, and they can cognitively distort reality to fit whatever they are feeling, this goes for past, present, and future.
It is likely you will hear from her again, it all depends on her emotion of the moment and who is available at the time.
I would recommend that you continue reading and learning about BPD, and seriously think about whether you would rather loose her or your family.