Sleepless in the Midwest

Have you ever been so desperate for something that your body would literally ache?  You would wake in the middle of the night unable to sleep, unable to clear your mind, unable to focus on anything but the object of your desperation.

I am entering this 'area'.  I (along with my husband) have a desire for something more in our lives and it is becoming a constant ache in my bones, a tightness in my chest, a thought that never goes away.  (No, I do not want another child.  : )  Not that the idea is taboo to me; it's just something I never think about. )

I am curious as to what would cause you to become desperate?  There is no right or wrong answer that I am searching for here... just curiosity as to what others think.  Take a moment and comment.  I would love to hear from you!