My thyroid test results are low t3, (liothyronine) freet3 is barely within range low end. How can I get my dr. To try thyroid medication to see if it would help?

Need more info. What are your symptoms? Symptoms of under active thyroid? What are your other levels? Free t4, tsh, thyroid antibodies test? If feel not getting anywhere you can try and see a specialist in thyroid called an endocrinologist who may be able to help you and explain your labs and treatment options if any available to you.