I also have a problem with yawning and sighing. It started about 2 months ago-seems that I can never get a really good breath. Wierd thing is that it goes away during sleep! My Dr. says it is anxiety related and prescribed .25 mg xanax as needed. It only seems to help a little. Does anyone else have this problem? I have had blood tests, an EKG, stress test, chest x-ray and pulmonary function tests and all came back normal!