My doctor's notes say: "It sounds as though she has an impulsive, open temperament plus a probable bipolar disorder that combines to create more symptomatology"

and then under diagnoses says:
"Unspecified Mood Disorder (r/o bipolar II d/o, r/o MDD with anxious distress)"

I believe r/0 = rule out, but what does d/o mean? I'm also confused why it says rule out BP 2? Does that mean they've ruled it out, or that in order to give me a firm diagnosis it's something they'd need to rule out?? (or is it because I once experienced "mildly psychotic" symptoms?)