Doctors are unable to diagnose, saying it could be from mitral valve prolapse, to asthma, or sarcoidosis in lungs. Some nights I am afraid to fall asleep because there is no pattern to these attacks, except to say they do come on when I am extremely tired. I have Hashimoto's thyroiditis. Endocrinolgist said there is no connection to thyroid. I was also diagnosed with sarcoidosis few years ago.
Lungs are clear now.