I am 3/4 of the way of completing my DWI probation. I have had an honest run with no problems (clean UAs, no violations)

Last month when reporting I was told to submit a UA. I had no objections to doing so, because I do not use drugs. When I was given the form it said ETG. Not knowing that this was an alcohol test I took the UA. I had drinks the night before, but not enough to make me appear hungover or raise an suspicion. Assuming I did test positive for ETG what should I expect to happen ? Will they take me in front of the court for merely failing for alcohol while on DWI probation ?