Incidental identification of
thyroid nodule during CT and MRI are extremely common and such thyroid swelling is known as incidentaloma. Once identified it is safer to undergo tests such as fine needle aspiration cytology and thyroid function tests to be sure about benign nature of condition. Your symptoms of anxiety and sleepiness have no clinical correlation with thyroid swelling
Next Steps
Consult nearby ENT specialist or endocrinologist for confirmation of diagnosis and appropriate treatment if required