Depressions

I been having sign of depression and its kinda real bad i just wish that everything was back to normal when im always happy and cheerful and carefree i wanna be back to that state this is killing me raging at random stuff... going crazy thinking of committing suicides i must be kinda crazy to think so much heard from my friend saying that i hit even criteria of a depression personnel i gotta visit a doctor soon before this gets worst!