I am a healthy 55 year old female. Only a few colds and maybe a sinus infection during my life. I eat good food. I help run a ranch and have another job outside the home. I am very active with my family. I do not each a lot of sugar. I weigh approximately 12 lbs. My question or symptoms: by early afternoon each day, I get incredibly tired. (not coming off of a sugar high, I promise) my head is hurting and then I sometimes have a deep cough, will take my breath away sometimes. This is not like me. I recover from this feeling slightly by late afternoon. I am trying to get more sleep, however, with our busy lives, that is not always easy. Once again, this tired feeling does not feel like fatigue. It appears to hit me all at once. I have checked my blood sugar...........fine. I have check my blood pressure......fine. Any suggestions?