You know more about your character than we do. Run your character through a
Mary Sue Litmus Test and find out if she's a Sue or not. They aren't the most accurate things in the world and like the intro says, not everything they have listed is something you should never use in a story, ever, but they do give you an idea of how your character is.
I've run my characters through them and some come out fine, but others get high scores. However I haven't had any complaints about those characters yet (and that's saying something 'cuz I've been using some of them for around 7 years now), so don't be too discouraged if your character ends up with a high score.