I am hyperthyroid, and also on many heart med's, when I started getting sick with the thyroid problem a couple years ago I had began to lose a lot of my hair and its still coming out, it looks its thinnest around the crown, I have my hair colored and got a bobb cut, but the thin area still showes through, of coarse being a woman this is very depressing, what can I do to make it look thicker?