What are the top 3 signs of ocd? if someone only has a few of the signs, do they have it?

Hand washing, organization, fears of violence.
( these are some signs of OCD) .. hope this helps

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.

Keep your breathing calm and try to ignore it