TPO antibodies are they ones that are thought and just about absolutely proven to cause Hashi's or the destruction of the thyroid. The anti thyroglobulins are antibodies that are beleived to be made to stop the production of hormone because to much is be let out into the system.......thyroglobulin and iodine is what thyroid hormone is made out of. In my opinion I see antithyroglobulin antibodies at higher levels then the TPO when the patient has temporary thyroiditis usually brought on by pregnancy or illness that will cause the thyroid to have to increase its production, ie.......flu, long standing colds, throat infections. A history of your symptoms will possible help us out about what might be going on with you. A ultrasound might be given to see if there is any destruction that has taken place to the thyroid.
Hope that helps.