I am hypo. Haven't been told my results, but Levo has been increased to 100mcg. I have to do another blood test after 6-8 weeks. I have a whole list of symptoms associated with my condition. I went to my GP yesterday about my continual IBS and asked him about T3. His very words were, yes you can test it, but we (the practice) don't because it is too expensive. Has anybody else come across this, and why is it so expensive??. I have never received any help about my underactive thyroid whatsoever in the 5 years I have been diagnosed. Not even an explanation of symptoms etc.