Hello everybody. Long time reader but never posted here - please let me know if it is not the right forum.

What exactly is BPD? How do I know my girlfriend has it? We have been together, monogomous, for almost 6 months. 95% of the time she is perfect - sweet, caring, nurturing, you name it, perfect. But every once in a while (kind of coincides with her periods), she tends to get a little crazy. Accusing me of thinking she's fat, accusing me of not liking her or wanting to talk to her, twisting my words to try and guilt trip me, etc. I never put up with it. I have had some serious talks with her and this has become very rare. She thinks she has premenstrual distress disorder. I'm not sure.

Thank you all in advance.