Downtime

"An artist must have downtime, time to do nothing. Defending our right to such time takes courage, conviction, and resiliency. Such time, space, and quiet will strike our family and friends as withdrawal from them. It is.
"For an artist, withdrawal is necessary. Without it, the artists in us feels vexed, angry, out of sorts. If such deprivation continues, our artist becomes sullen, depressed, hostile. We eventually become like cornered animals, snarling at our family and friends to leave us alone and stop making unreasonable demands.
"We are the ones making unreasonable demands. We expect our artist to be able to function without giving it what it needs to do so. An artist requires the upkeep of creative solitude. An artist requires the healing of time alone. Without this period of charging, our artist becomes depleted. Over time it becomes something worse than out of sorts. . . . "

~The Artist's Way by Julia Cameron

I think we all have felt these things at some point or another ...as it applies to more than just artistry . . . :)