Menopause. It sounds like you might be entering menopause. Especially if this is close to the age your mother went through menopause as daughters often follow their moms in this regard. This can be treated with hormones or medicine like Clonidine or nothing at all depending on severity. See your doctor to discuss.
Thyroid/menopause. The two most common possibilities would be perimenopausal symptoms, and hypotyroidism. Your doctor could evaluate the symptoms with a few simple blood tests.