I am yawning excessively, but they are unfinished. i only do a half of yawn which is unsatisfying and results in another a few seconds later.

Not a disease: What you described is not a disease, just a variation on normal life. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex.