It's called "the let down." It's normal, but I think some of us experience it more intensely than others because our systems are out of whack with the chemicals in our brain.

I find that if I "give myself permission" to feel what I'm feeling and don't stress out more, I get over it quicker.

I LOVE your tag line!

<font color=blue>This above all: To thine own self be true. --Shakespeare</font color=blue>