Help! Animation due tomorrow!

If you are using Windows - try changing your display scaling to 100% in the operating system.

Moving to Adobe Animate CC - General

Try maximizing your window using the options in the upper right corner of the window and see if things adjust to fit the screen properly.  If not, try de-maximizing it so that it is smaller than the screen size and see if they show up. If neither of those help, try resetting the workspace.