Hi Little Me, and welcome!
I went to a pdoc for about 4 years, being treated for depression and add. I felt like it came out of nowhere when she dx'd me with bpII. She said that it usually takes many years to dx someone with bp, that I had persistant low-grade depression that was unresponsive to anti depressants. We tried different meds like lamictal and abilify, and I finally went with lithium, she said it would be effective against the depression and stabilize mood. And the lithium has helped very much with the depression. I still have swings, I have hypo/mania, but I feel more stable. It's not perfect but more stable is good for me. I needed the craziness of depression and hypo to slow down a bit so I could get my life together.
Hope your doctor visit went well! Keep us posted.