Can hypothyroidsm cause fatigue even if you have normal thyroid levels?

NO: If your thyroid levels are normal, (both TSH and free t4), your fatigue symptoms would be related to something else. Unfortunately, fatigue is one of the most common symptoms that people have with almost any disorder. If it persists, you should see your primary md for evaluation. In your age group, anemia due to iron deficiency, is a common cause.