If you have a sense of consternation you have become afraid, disoriented, or completely befuddled. It comes from the Latin roots con- and -stenare, which means "spread out."  In orther words, it comes from the verb consternare ‘lay prostrate, terrify’ to the Latin word consternatio, and when it came to English they merely added 'n'.   

The word "consternation" first appeared in the English language in the early 17th century, specifically around 1611.   Randle Cotgrave noted the earliest use in his writing. 

Examples of "consternation" used in a sentence:  
"I always welcomed clover, much to the consternation of the neighbors" 
"Jill, your book has a happy ending that created consternation among some early readers." 
"Much to her parents' consternation, she had decided to not go to college." 
"The candidate caused consternation among his supporters by changing positions on a key issue."  
"I sleep in consternation not knowing where my keys are.
"Full of consternation at first, the boy now thinks he aced the pop quiz." 
"Discovering a water bug crawling on the ceiling left me in consternation for hours."