Agree, get your thyroid checked, however, the best method is to take your waking temp first thing in the morning for four days. If your temp is below 98.0 for those four days, most likely an under active thyroid, which most doctors can miss on a blood test, take those readings to your doctor for a complete blood work up (not just your thyroid, get a full panel screening). Most post menopausal women will need some good fats in your diet such as evening primrose oil and fish oils to help balance hormones. Virgin coconut oil is also fabulous, you can go to www.bodyecology.com for more info as well as Mercola. Soy in its fermented state is best, NOT all soy is created equal. Miso soup, edamame is all good. You need to noursish your body from within, hair loss, dry skin, brittle nails are all key signs that you are lacking good fats, need key digestive enzymes and probiotics. If your body is not digesting foods properly, it will show up through your skin, hair, nails, among a few things. Good luck!