Rather than questioning why, it's best to describe the symptoms the next day to the doctor and get the episode treated. I agree, it is sometimes not useful to stick to our old ways of thinking in which we demarcated anxiety and depressive disorders as separate when in fact, there is only a very fuzzy border, if any, between them. Today we're developing diagnostic ways of thinking to allow for the fact that so many of these episodes present with symptoms of both anxiety and depression. It is far more than anxiety. Unipolar depression is just the lows.
Anxiety can occur in both manic or depressed episodes.
So, if the symptoms fit a pattern that is more one than the other, I say so. Since many off the drugs work on the same chemical system, it sometimes doesn't matter what we call it because the treatment will in these situations be the same. It's hard to know how to interpret the different claims these days. It is very important that we break down the stigmas that have interfered with people getting help for these problems. My psychiatrist is considering a bipolar II diagnosis.