I would let the doctor know this and ask about a thyroid test for a low thyroid. Also, if you are entering peri-menopause, you can experience this as well.
have you had your thyroid checked? my aunt had the same thing and she had hypo thyroidism. :) it could just be a serious case of a skin fungus on your head. i would use selsum blue for a few days and see how that goes. if the hair loss doesn't stop after a week of using it, i would go to a doctor. have you been gaining weight? or do you notice rough dry patches anywhere else on your skin?