"I didn't realize until yesterday how dependent I am on the guitar when I'm working on a song!"
I know what you nmean Ebbie - but it's a trap. Take advantage of not being able to play right now. "Not keeping the tune straight" might be just what you want to do. That's just what guitars tend to do, iron out the subtleties in a tune. I love the guitar, and I tend to us it when I'm singng. But I know when I'm in a setting where people are attuned to singing without accompaniment, and I can sing without it, the tunes and the timeing can get a lot more interesting and powerful.