The thyroid gland is not considered to be a regenerative organ. A suppressed TSH does not mean you are over medicated. If you were over medicated, you would have symptoms typical of hyperthyroidism due to thyroid levels that are too high. Diagnosis is best using an evaluation for symptoms, along with tests for thyroid hormones Free T4 an Free T3. So please tell us about any symptoms you have. Also pleases post syour thyroid related tes results and reference ranges shown on the lab report.