I'd call the doctor and get it checked too Missy. But, a goiter is very common from being hypothyroid - it is trying to make hormone and so it keeps growing. Your TSH is probably high too....screaming for thyroid. But, yes - please get it checked - those crazy lab results you have had are screwy to say the least. The Synthroid should cause it to shrink but it takes time.

as if you didn't have enough to worry about!! (((((HUGS)))))