I was pretty self conscious in high school, so I wore a lot of black clothes since black is slimming. Black jeans, black tee shirts or sweatshirts, and other dark clothes. People were always asking if I was goth. I never quite understood that. I think I painted my nails black once or twice too (or at least a dark color that looked black). We never had any problems with goth vs. preppy kids, so I didn't get into any trouble or anything. I agree with what someone else siad, find out what the rule is. I would have been a little offended also by the teacher calling you trashy. That was wrong.