I Have OCD

I Have Obsessive Compulsive. Really Bad. I Have To Have Everything Colour Coded, In Alphabetical Order, Or In Size. I Am Usually Good At Controlling It. But Sometimes I Just Can't. I Get Compulsions To Press Certain Things Or Do Certain Things If I Think Of Them For To Long, Or I Erase A Whole Sentence If I've Made A Spelling Mistake. It Takes Hours To Write Things :(. I Tried To Tell My Parents [By Letting My Strictness On Keeping It Quiet Down, And Doing Things The Way I Really Wanted Them ] But My Twenty Year Old Sister Decided To Take It As A Joke And Started Copying Me, And Re-Arranging Things As If To Say That 'I Have Obsessive Compulsion Too!!!' She Actually Said To Me On Day After I Had Just Finished Doing The Living Room All Nice And Neat, And After She Had Suddenly Decided That The Bathroom Needed Cleaning She Said 'OCD Much. I Think That Your Just Being Silly, You Didn't Need To Clean The Room, It Was Fine, But I Get The Actual Compulsions To Do It!' I Went And Cried In My Room For Ages! My Parents Will NEVER Believe Me, What Can I Do???