Interestingly, i started off as you did. I had an onset of PTSD, so no one evaluated me for ADD, health problems, other issues.After a couple of years, finally found a good internist who took care of some of the undiagnosed health issues that cause depression, but all the specialists were no help. I had CT scans, MRIs, etc, as well.

It wasn't until i addressed the sleep issue, which none of these specialists considered, that I started to improve and it's going well now. Finally.

Antidepressants also worked for me with my onset of PTSD, for about a year. The thing is, trauma screws up your nervous system, preventing the restorative sleep. It is also linked with auto-immune disorders.

I was thinking of doing the genetic tests just recently, but they are very limited and for me, would result in being prescribed more rounds of antidepressants and other related medications instead of someone thinking out of the box to solve the problems. I wish i knew about it years ago, though.

Good luck to you.