To me, what you are describing is someone who has "high functioning" depression.

I can relate. Most people don't see my symptoms, though it's mostly because I try to act like they're not there. But the few people who really know me, know.

Most my non-psych doctors don't make a big deal out of my mental health. I can tell my primary I have SI, and he will just slide right by that. I've even had a neuro-psychologist tell me that I can't have BPD because I'm too nice.

As for what to do: keep trying. That's all you can do. Whatever route you take. I hope the new psychologist works out. Maybe try meds again? They have better ones now.