I get the impression that you're looking for some sort of vindication here.
I got 2 DUIs - 34 years ago - Laws have changed, for the better I think and once the alcoholic fog cleared, about the only thing I could think of was ... did I kill anyone, children, seniors? If you didn't kill, or maim anyone then you're fortunate. Keep using though and you will. DUI is not a joke.
I'm with tomsteve, if you believe that only "a little coke" is OK, then you need to look seriously at whether you want to be clean and sober. If you do, we can help.