For the past few days, I've been yawning a lot, much more than average (once every few minutes I feel the need). If I'm not yawning I'm breathing in as deep as I can to get similar "satisfaction". Often I cannot get the "satisfaction" from these and so the urge grows and grows, meaning it can get quite uncomfortable. When I do manage it, the urge is back a few seconds later. I'm not particularly anxious about anything in particular, and get the same amount of sleep as before this started. This also happened at some point within the past year which continued for a day or two if I remember correctly. Does anyone have any idea what it is or how to make it a bit better?