Minor possession of marijuana?

My friend and me are both 15, and we were dumb enough to go to this party. 5mins later after we get inside, the cops in. They searched everyone, and I left my purse down for a few mins, and picked it up after the cops in. They searched me and apperantly a pen like pipe filled with some weed in it, like all dried up and stuff. AND theree was a cocaine thing involved in the room, so they caught a guy. And arrested everyone else, my friend and me got to go home after they brought us to the police department. But we got two fines and have to go to court. I dont want to go to probation for 6months!! or community service! My mom and me have no money at all. What do i do? Do i even hve a chance? I don't smoke!!!!!!