Final answer:
The patient's symptoms suggest a diagnosis of Addison's Disease, which is characterized by insufficient production of cortisol from the adrenal glands.
Step-by-step explanation:
Based on the symptoms described, the most likely diagnosis for the patient is Addison's Disease. This is a condition characterized by the insufficient production of cortisol from the adrenal glands. Symptoms of Addison's Disease include hypertension, fatigue, weakness, hyperpigmentation, GI disturbances, and menstrual changes. Diagnosis typically involves blood tests and imaging tests of the adrenal and pituitary glands, and treatment involves cortisol replacement therapy.