Hi, After Few Weeks I Start Getting Dpressed...there Is Alot

hi,
after few weeks i start getting dpressed...there is alot of depression in my mind..which leads to abnormal chats..
weird behaviour etc.
i could not behave normal...i seems everyboday gets annoyed..nobody understands.
there are alot of moodswings as well..
sometimes i act like i dont care..
but at the very moment i get very much possessed.