And feel like you will be completely incapable of doing the appointment because of barely to no sleep?

Well, I just did that guys.

I only slept about 3 hours last night. 

This appointment is located hours away. It was a very important appointment. Now it's cancelled.

And do you guys get this too - then the anxiety from cancelling is running through you so you can't even nap. 

I hate anxiety. Am I alone in this happening?