Vampire story help? I'm a writer and trying to write something about teenage vampires...?

So...I'm a writer. And I've been racking my brain for ideas that haven't already happened in vampire literature. I love romance. (I HATE THE TWILIGHT SERIES SO DON"T EVEN BRING IT UP.) But I was thinking about a young vampy vigilante....ummm I just need some origional ideas that you don't mind me using and perhaps tweaking to fit my needs...