same here except for thepiercings. My school was cool about most everything. I was the only kid in my school with a mohawk for the entire 4 years I was there. I had dyed hair, the works. I had my first set of locks in my senior year. The only dress code the tried to enforce was that we couldn't wear coats in school. they had to be in a locker. Funny thing was that everyone was scared of me in high school. I wore combat boots with spikes, all black, black nail polish and eyeliner, 00 gauge lobe, 12-10 gauges up the sides, my lip, and tongue pierced, purple mohawk, and a black leather trench coat. I never took my coat off even for gym. And I was never asked to. I don't know if it was a fear thing, cause by the time I was a senior, all the new freshmen were scared of me, but everyone, including the teachers stood up for me and said I'd never hurt a fly. They still never argued with me about the coat though.
Stand up for yourself. What are they really going to do? If they try to suspend you, you can have your parents come in and say that they want you in school. If your parents do that, they have to comply. Suspension is only successful because most parents don't contend it.