I have had hypothyroid symptoms for a long time. When I have levels checked they are within normal limits. I have thinning hair, brittle nails, weight gain, fatigue, memory problems. I have been told to have my cortisol levels checked. I recently had a physical and the blood work that goes along with it plus thyroid testing again. My level was something like l.24. Which is within normal limits according to my lab. Are cortisol levels normally checked or do I need to ask specifically for that test. I have quite a lot of stress and was told to have the cortisol checked.