Iraq war veteran mallory was diagnosed with psd based on symptoms of : 1. nightmare and flashbacks 2. lost interest in what she used to like 3. difficulty sleeping and keeping her mind on any subject 4. all of the above

Yes you do , which is cool

Depression is lifelong, though you can get medication to with it. the difference between sadness and depression is that sadness lasts a little bit, depression last a long time and it goes on and off. people usually get depression through experiences they have been through, or genetics.