I am juggling too man projects and wake up at 1am feeling completely overwhelmed: What if it's due to boredom? It's true - you can be bored because you have too much to do and can’t focus on the task at hand.
I never considered too much work to create the feeling of boredom, but then I realized that I was creating new ways to do the work I'd been doing because I was bored with the way I'd been doing it.