my pages icon has disappeared and I cannot access the program!!

Have you tried opening Spotlight (Command + spacebar or click the magnifying glass icon near the right end of the menu bar) and typing "pages" into it to see if it finds Pages?

If it is found and the problem is that it isn't showing on the Dock, you can open Finder and then use the Finder "Go" menu and click Applications, locate Pages and drag it to the Dock.