I mistakenly waived my rights to a jury trial !?

I just realized that in a town of 600 people and the judge is elected by a city council of 7 , After the fact, I don't want a bench trial, I want a jury and a public defender appointed to me for a minor obstruction charge against one of the only 2 cops in town who wrote me an obstruction charge from what a state trooper told him I did at a safety checkpoint as a passenger and that would be not moved fast enough !!! i made a mistake in requesting a bench trial and realize I will lose even though I am right ! What can i do In WHIGHAM, GA. Google it ! its pathetically small !