All of a sudden this isn;t like other rush threads... what happened to be yourself, have fun, etc?
Girl rock the nose stud and be proud of it. If girls can't accept you for who YOU REALLY ARE, do you want them as sisters? Does having a sparkling nose accessory make someone less of a person?
Deffinilty no, and I understand that people do judge and first impressions do last, but I say as long as it's in good taste, wear it. They will deffinitly remember you!
Best of luck!