depressed...

I think I'm having depression soon. my mind is occupied with a lot of stuffs. trying to concentrate more on my work so tat I dun imagine so much but dun think it helps much. have to fake a smile in front of my friends & colleagues... felt distressed & restless right now. it had been quite sometimes since I had this feelings... too troubled with relationship, friends & works. really wan to lock myself away from the world outside. I'm afraid tat I might self-inflict myself again if I am too depressed. plz control urself, Agnes...