I had a few drinks last night! And stopped @ 9 p.m.. . I will have a REGULAR urine-alysis by six pm today. Will it at all still b present?

Very unlikely. Alcohol is eliminated at about one drink each hour-fifteen minutes (ave.). Also, most EtOH urine tests only detect down to .02.

Unless you drank a very large amount in a very short period it is most unlikely to be detected at 21 hours.