My first DX, (late teens) was depression and social anxiety. It took a long time to get to a BP DX.

I still battle depression most of the time. For me, Bipolar is primarily a depressive illness. After my hospitalization, my DX went from Bipolar unspecified, to Bipolar 1. I have no idea why.

Depression is a big part of bipolar, but I've never heard of someone holding both DX's simultaneously, unless they are by two different doctors, which is very possible.