Thanks you guys for all of your answers. I'm just trying to figure out if this is what I'm really experiencing.

It has been different at other times - sometimes I DO feel really creative and just pleasantly high, indestructible. Hmmmm, not sure when the last time that was however.

But this time it's just an annoying humming, and I'm most certainly irritable and snappy today. One cup of coffee this morning seemed to tip me over the edge. The sound of the TV in the background was torture and I had no capacity to deal with my child asking a simple question. Just him calling my name made me cringe. He asked me to sit down with him and I just told him honestly, "I can't sit still right now, I just can't." And all I was doing was walking the kitchen in circles, then back to the bedroom. Ironic for a mother to tell her six-year old that she can't sit still.