The song I've been working on for over three months is finished. Hooray!
This means I'm between songs.
You know how it is when you get something stuck between your teeth, like one of those little popcorn shells? You work and worry it with your tongue, try to claw it out with fingernails, but you can't get it out to save your life ... until suddenly you do.
You feel enormous relief. All is right with the world. And yet, part of you kind of misses the struggle.
Same deal with songwriting. I've been ready to get this tune finished and put away for a while now. But I want to start working on some new song in its place, to give my mind something to work and worry over.