Depression, stress. Is happening to me.

Since last few years, I have been not doing much in my life, studies, job, career etc. So, I am facing failure. I am facing pressure and stress from all directions. Sometimes, I cry for no reason. I suffer from Mood swings, depression. I just feel like sleeping all the day. I have turned up to be the most laziest till date, I have never been like this. I just feel like doing nothing amd lying on my bed the whole day and I do this oftenly. I am too emotional and too strong, may be split personality. i cant focus. i have so many thoughts. I am studying, but in exam hall, I can't focus on exam. there are many other things. i feel like writing, but when I sit to write, I am short of words. I feel like its of no use. i watch motivational stuff online, but it just doesn't go into my head for long. i don't know why and what is happening to me.