Q. A 29-year-old female patient comes to the physician’s clinic for a routine checkup. She reports feeling tired for the past several months and sometimes experiences 'brain fog.' She also complains of increased sensitivity to cold and dry skin. Her vital signs are within normal limits, but on physical examination, the physician has noticed that her thyroid is mildly enlarged without nodules. On Lab investigations, her TSH level is 7.5 mIU/L, and her Free T4 is 0.9 ng/dL. What is the most appropriate initial management for this patient?