Does it ever slow down?

I'm just going to say it:

I'm exhausted!

In the last seven days I have:

Participated in two conferences (student matters) here at work;
Worked at two career/resource fairs (on my feet for at least 5 hours each);
Participated in a condo association board meeting;
Cleaned my house for potential buyers to view;
Worked in the new Facility of my local church, preparing for the dedication (www.moodychurch.org) 12 hours on Saturday, and 8 hours on Sunday;
Put in 40 hours worth of work in my office.

Where did my weekend go? I spent at least 20 hours out of 48 at the church--I was happy to do it, but I'm also glad that "dedication" is behind us.

My back hurts, my feet hurt, and I just feel drained.

And I'm not even married! And I don't have small children at home!

What is my problem?

I just don't seem to have the stamina nor the energy that I once had.

Oh well.....