I can’t say much about Williams, but I’d say you’re pretty competitive for Duke, and Yale, like all the other Ivies, is essentially a crapshoot as to whether or not you get in. Like another poster said, I HIGHLY recommend taking the SAT Literature test, and AP Lit next year (if it fits into your schedule, that is). Also, with all your writing accomplishments, I’m assuming you’re going to have a fantastic essay, so that should help you a lot. When you’re writing your essay, be sure to include that you’ve “taken every opportunity”, though your opportunities may be limited due to the school you go to and their scheduling issues. Good luck!