My anxiety got better with lithium. My doc thinks my anxiety is an expression of my hypomania and depression. You can have ptsd and bipolar. I mean i think it would make more sence to keep treatment resistant depression labeled as bipolar 2 or unipolar or major depression VS mood disorder NOS. It sounds like your doc is confused. I’d get a second opinion. It sorta changes how you treat it. A mood stabilizer is the only thing that’s helped my depression I’ve tried tons of SSRIs that don’t help and just make me sick. Good luck!!