Great Costume! You did a really good job! Now on to the more important things... YOUR HAIR!!! You don't have enough for the bun... might be able to pull off the Living Witness 'do. We will need another pic for "the bob" also if you go Living Witness you'll need black gloves and a black mock-neck underneath.
EDIT: I just saw pic of your hair... Computer slow
So unless you cut your hair LW wont work. Janeway bob might or you can get a hairextention.