If you are tired all the time, it's important to see your physician to rule out common causes of fatigue. Three of the top causes are iron deficiency anemia, hypothyroidism and mono. I know what you are thinking here, there's no way you have mono, that's for college kids. However, mono is actually very contagious. You don't need to swap spit with someone to get it. You can also catch it from someone sneezing or coughing near you, eating or drinking after someone and possibly just being in close contact with someone. And if you are at the doctor already, drawing a little more blood and getting a mono spot test is worth it!
Click here to find out what labs you need to test for iron deficiency and for more information about hypothyroidism, click here.
So what do you do if all three of these tests come up negative (meaning you have none of these conditions)? Now you look for other causes such as stress, depression, sleep apnea, a hectic busy schedule, lack of sleep (or lack of good quality sleep) and what you are eating (or not eating). Sometimes, figuring out what may be wrong is best done by process of elimination. You eliminate the potential obvious issues and then look for other possibilities causing the problem.