I had my thyroid gland completely removed in the fall of 2012. I ve been on meds since then. All of a sudden a week ago, I began having the symptoms of hypothyroidism, the most significant, being really cold. Today I also noticed a weight gain of 3 pounds over the last week and I ve been very active, more than usual. Had thyroid test run this last Thurs, TSH was good, T4 was a12, which I understand is higher than normal. No one seems to know what that means or if something needs to be done about it.