My suggestion for that: lose the rape. Or if you maintain that plot device, keep it so subdued in the storyline that you really have to be paying attention to pick up on it.
My reason is that, unless you're going to go for some wildly melodramatic piece (Von Trier with the subtlety of Baz Luhrman), you run the risk of becoming very maudlin, contrived, etc., especially when you cram all that courtroom stuff about the rapist getting off, all into a seven page short.
I'd try to internalize the story as much as possible. One route, which has been done before but could still work, is to show her taking the piercing thing to extremes; show her having other piercings, and lots of 'em.
I don't know --that's just my initial gut reaction. I'd say write whatever you want, and then post it here. Three weeks is long enough time to put together a really tight short.