What are the possible charges?

I am 15 and on 4/20/11 I was arrested for possession of marijuana (about a dime) and possession of drug paraphernalia (a pipe). I live in Ohio and my court date was 6/15/11 and my mom made me plead not guilty so the magistrate placed me under house arrest. What are the charges that I may face? Also: please don't tell me not to smoke, it wasn't mine, but it was in my purse. I take full responsibility for the mistake I made by allowing it to be put in my purse, but I don't smoke and the officers put in their reports that as a judge of character they didn't think it was mine.