Multiple column link

I am working on my site and decided to try the multiple column link. It put up html code and my content for that page disappeared. https://www.caringisorganic.com/wp-admin/post.php?post=840&action=edit Unfortunately, I don’t think I have a back up feature working but will today! My site is https://www.caringisorganic.com. How do I cancel that link if I don’t want it and can I get my original page back?