Help

Ok....I must have done something very wrong while playing around with my background and template. Now, when I go to the customize page, there is only Posting, Settings, Template and Monetize tabs. There is no tab for Layout. So I can't change the header or any of the sidebars. It deleted the blogs that I read and I can't add them back without that tab. Does anyone know how to fix it? That is what I get for pretending to know what I am doing.