Don't frame yourself as a nerd just because of your appearance and how much you achieve in life.... If YOU dont want to be a nerd, then don't frame yourself as one.... I bet your a very beautiful person.... So If you think a nerd isn't beautiful... Become something else ^^.... well.... Unless you're proud to be a geek, like me..
Well I have all three of those...braces, glasses, and I'm pretty smart. After I got them people just asked about my braces and I was still treated normal. So good luck and if anyone makes fun of you and calls you a nerd, just say "I will have straight teeth and get into a good collage.