Another thing, Bex, anything autoimmune, like Hashimoto's Thyroiditis (hypothyroidism) or Grave's Disease (hyperthyroidism) can be triggered or worsened by anything stressful in your life. This flu' could have triggered thyroid symptoms or made mild symptoms much worse, and it may be a permanent change. The address for the test is http://www.canaryclub.org. Get checked now! But, again, for now, a blood test from your dr. would be faster or a naturopath who will go by symptoms would be fastest.