I just had a serum cortisol level at 8am and it was 0.92. I took 1mg dexamethasone at 1130pm the night before and was npo. My free t4 was also right smack on the low end of the level and so was my tsh. my sed rate is elevated. I feel fatigued, have muscle weakness, started gaining weight and have dry and brittle hair. Last week I lost a small patch of hair. I am only 36 and have no family history of thyroid issues. What could cause this. I haven t seen the Dr. yet to review the labs, but I was able to access the results through the patient portal and have an appointment in 2 weeks. I just don t want him to blow off my symptoms because this is not normal