Oh, the fear of thinking that you chose the wrong school! This fear will be there until you set foot on campus. But fear not! As the article well says, "It's not which college you go to, it's what you do once you get there." Make the best of it!
Read this article that came out The Choice column on the New York times: https://thechoice.blogs.nytimes.com/2013/04/29/envelope-please-will-walker-8/