oh **** man , i thought i'm the only one, we are on the same boat. i've been in IT for almost 10 years now and everyday i DON"T KNOW what I'M DOING.
everything i just ASSUME and hope it is right, when it has been wrong too many times, i will switch job and that's how i survive for 10 years and stress all day.

but rest assured, i belive many others out there..