Thyroiditis would indicate, either Hashimoto's or Graves Disease. Your thyroid seems larger than normal (due to the thyroiditis), which means you have a goiter (swollen thyroid). Have any other tests been done? What blood tests were done to determine thyroiditis and what were the results, with reference ranges?
I can't really speak to your ultrasound results; however, I would like to see your blood test results and their reference ranges shown on the lab report.