If you have bipolar1 or bipolar2, depression is a part of the bipolar, it is
not a separate issue. Lots of people say they have depression and bipolar but
if you have bipolar the depression is a given. It is also very common to have
bipolar along with GAD or ADHD. I have bipolar2, ADHD, and GAD.
My understanding is that this is not uncommon at all.
I am not sure about you not considering yourself bipolar any longer, it doesn't
just go away you always have it but you do your best to keep under control.
It could be that you are dealing with rapid cycling bipolar.
I cycle rapidly, sometimes within the same day sometimes in less time than that.
It can make you feel physically sick at times, it is hard on the mind and the body.
I am not sure if anything I said helps but I hope you can take something from it.
I hope you get it sorted out soon.