Other possibilities are chronic fatigue syndrome, depression
, low Vit B12, low iron, low calcium, sodium and potassium. Hyperthyroidism too causes
increased sweating and tiredness. It can also be due to menopause so get female hormone panel including LH, FSH, prolactin, estrogen, progesterone done. Do discuss this with your doctor and get yourself examined A comprehensive investigation is required keeping all the points in mind. Hope this helps. Take care!