What makes you think you have Hashimoto's? What's the reference range for the Thyroglobulin Antibodies (TgAb)? Most labs are something like < 60. If your TgAb was only 1, that would be considered negative.
Have you had a Thyroid Peroxidase Antibodies (TPOab) test? That's the other antibody that can diagnose Hashimoto's. Some people have, both TPOab and TgAb and other have one or the other...
Your TSI at 394 is definitely positive for Graves, even if it might be under the reference range... Diagnosis is based on a percentage of the reference range.
Some people have both Hashimoto's and Graves.
How long were you on the Synthroid and why were you taken off it?
Vitiligo is not a symptom of a thyroid condition; it's an autoimmune condition of it's own, that can co-exist with a thyroid condition, because when one has one autoimmune condition, it's very common to get another...
Was the TSH, at 0.02, the only thing that indicated hyperthyroidism or did you have symptoms of being hyper, as well? When one is on replacement thyroid medication, TSH often becomes irrelevant... Your Free T3 and Free T4 do not indicate hyperthyroidism, at all.
As I noted before, some people have, both, Graves and Hashimoto's, with one or the other being dominant. Apparently, for you, Hashimoto's is dominant.