Depression. Long. cannot sleep properly.

I get angry very soon. My mind is racing like anything. I feel dull all the time and agitated on everyone. I cannot get a grip on myself. I just want to shout and cry all the time. I do not understand the reason to why me. I want people to take care of me. I feel unattended all the time, unwanted and disrespected for each and every reason. Rage of anger and frustration is frequent in a day. I feel lack of concentration and inability to speak and express and if I do I just beat around the bush and spurt out things I do not mean. I scream like mad. I want to be caged. Some time I feel and want to behave like a beggar or insane person deliberately. Please guide me how to control this as I don't know what is going on with me. Feeling of insecurity lingers all day long. Cannot sleep properly.