grace41,
Did you do a spot urine iodine test or a loading iodine test where you take 50 mg. of iodoral and then collect urine for 24 hours? Most iodine literate practitioners don't put much stock in the results of the spot urine iodine test.
To answer Critterina's questions, in regard to the loading iodine test: the more iodine is found in the collected urine, the more replete the person is in iodine. The body doesn't need to hang on to the iodine because it has enough, so it mostly gets excreted. Whole body iodine sufficiency is arbitrarily defined as 90% or more of the iodine load excreted in the 24 hr urine collections. See
http://www.optimox.com/pics/Iodine/loadTest.htm.
Dr. Zava of ZRT labs considers the urine iodine loading test as currently practiced to be a flawed test. If you do a google search on "iodine loading test", the 5th result listed is a pdf file by Dr. Zava of ZRT Labs. The file name is Flaw_in_the_Urine_Iodine_loading_Dose. Also see
http://www.townsendletter.com/Jan2013/iodine0113.html