Ubuntu 12.04, Unity launcher missing [duplicate]

I am new user I just messed up some option in compiz Config Manager and it has to do with Unity. I was on CompizConfigSettings Manager menu and I clicked one of the options and whole Unity tray GONE! I also can't se Time and Date. So basically since I installed it yesterday I don't know about shortcuts in Ubuntu and how to restart it. Basically I am stuck on desktop background, it is only thing I can see.I managed to run Nautilus and access the Web browser. So If somebody can tell me how to access terminal or to restart Unity(if I only can see Dash or terminal).

Press ctrl+alt+t for opening a terminal.

You can try the folowing commands for restarting (or start) compiz or unity in terminal.

compiz
unity

If this not work try to restore you setting using:

ccsm

go to preferences, select unity and press restore default.