I'd be curious to ask the pdoc why she is so convinced you are bipolar. Yes you would have mood swings, but they don't shift as quickly as they do in BPD. From my understanding the moods in bipolar disorder last longer and are cyclical. It very well could be for insurance coverage, since a personality disorder as the main diagnosis gets you very little coverage. But that's between her and the insurance company, not you. If you can't get clarification I would look for another pdoc.