I had the BP-NOS label for a couple of years because my pdoc couldn't quite put a finger on whether I was BP 2 or BP 1. Then I had a defining episode that earned me the diagnosis of BP 1. Then when I was in the hospital, the dx was changed to BP 1 with severe depression and anxiety.

TBH, I hated the NOS designation because it was so nebulous, and I went in and out of denial that I even had bipolar. Now the denial is completely gone and it's almost a relief to know exactly what I'm dealing with.