This is Dr. David
I am sorry you have had this diagnosis.
these thyroid peroxidase [TPO} lgG antibodies can attack your thyroid gland and cause thyroiditis
or inflammation of your thyroid gland called Hashimotos thyroidiits.
and cause your thyroid gland not to work as well as usual
is your TSH levels elevated?
have you been started on thyroid supplemental hormones?