I’ve been Mia-diagnosed for years with Bipolar when I was BPD. My last two psychiatrists read between the lines and asked the deciphering questions...do you have regular sleep cycles and how long do your mood swings last? They also keyed in to the flavor of these mood combat zones. BPD people have regular sleep cycles and our mood descents, I call them, last a few hours to a day for me two at the max. It’s heart not mind like bipolar. BPD effects my relationships. All these years I’ts harder to treat and diagnose than bipolar, the current flavor of the month. Now I’m mad.