Access-fandom referral, and Fractious from the Whateley Academy stories at http://www.crystalhall.org has OCD. She's referenced in the Lit-Chix stories and in Ayal and the Networks, but she's the viewpoint character in Stress Fractures, found here: http://www.crystalhall.org/FractiousFC.html

Sorry, I can't say how good a representation she is.