What is wrong with me ???

I don't know what is wrong with me, how do i descibe the feeling i am having ?? Never felt this way before, I am like so frustrated, so uncomfortable, then its like everything I do feels wrong ... And I just can't concentrate in what I need to do ... And I don't understand why I am feeling this way, I don't know what the reason ... It so irritating loh ... maybe getting some sleep would make it fade away???