HELP

Hello, My name is Rev. I have an alienware alpha i3. It has been amazing and I love it so much but for the past month I havent been abld to use it. Every time I log in everything is fine (I am on desktop mode), I can see my backround and it says the correct time and date. It shows my WiFi and everything. When I go to log in it works fine and I type in my password and after a bit it logs me in. Immediatly after the screen goes black. The console is still on and plugged in. If I move around my mouse I can see my cursor but everytime I type in a command it doesnt work (ctrl alt delete, etc.) I really need help!

Thanks!

Rev Hill