What are you waiting for? The other shoe to drop? The timing to be just right? The fear to subside? The worst thing you can imagine to happen? Holding your breath won't keep you afloat; it will simply wear you out. So right now, EXHALE.
Do the thing you can't stop thinking about.
Say the words that are weighing on your heart.
Release the tension that's been gripping your mind, your body, your soul.