It would be so useful to have some sort of medical test diagnosis like a blood test for depression (not based on psychiatric diagnosis or brain scans, etc.) but something you could do at home - like a pregnancy test - and then when others don't believe what you are saying you can show them the test and prove yourself. That's what's happening to me at the moment. I feel I need to "prove" my depression to others. It is tearing me apart. I don't know how I come across during this post I'm just upset.