Hello @dwhite1822 ...

If you scroll all the way to the top of your screen, in the upper left corner (above your "Account" button), do you see either the Canvas logo or your school logo?  Just to the right of that logo, you should see three horizontal lines (sometimes known as a "hamburger" icon) followed by the course name.  Click on that "hamburger" icon, and your course navigation menu should return.

Hope this helps!  Let Community members know if you have any other questions about this.