Depression problem. Is this depression?

For the past 1 year,I don't know what is happening with me; and it growing up Day by Day.I am depressed everytime.I keep annoying,every time it gets irritated.Every time I show anger on others. Everytime my heart keeps crying.I cry a lot,anytime in the day too much.I do not like anything.I hate everything.I don't like to talk to anyone.When I get angry and become very irritated then my head starts to feel very much in the middle of the brain;it seems as if I would go crazy.Pain is also cause by speak up and reading something.When I cry it seems as if someone has laid too heavy stone on my head,but after crying it feels good.I have become very weak, my weight is decreasing day by day.I do not even want to do some work.I feel a fall in myself day by day.I feel lack of hope.In the brain,there are vomiting things. sometimes in the day also talks about death that i will die.Feel hopeless and helpless.Do not even feel hungry.sometimes i feels good to harm others,makes me feel relaxed.