For the last week I've had a constant urge to take
deep breaths, and fill my lungs so that they feel stretched. The breath gives minor satisfaction, but then the urge returns.
Sometimes, I feel like I need to yawn, but the yawns are not satisfying like they should be. I don't have any problems breathing, nor do I have any other symptoms, like coughing, raspiness or wheezing. Just this persistent urge to breathe deeply.