I am newly diagnosed and new to this forum. Just wanting to ask for any input concerning my levels. TSH was 103 (reference range 0.4-4.0) and free T4 was reported as "undetectable" <0.35 (reference range .8-1.9) with Total T3 reported at "undetectable" <40 (reference range 82-179). Saw endocrinologist immediately who diagnosed me as hypothyroid, and put me on 100 mg levrothyroxine. I have been on it for five weeks. Feeling better, but can't test again for another 3 weeks. She said to only have the TSH retested, but from what I read here, I should have other things tested as well. How long might it take to get me to the correct levels? And is there generally memory/cognitive improvement when all gets regulated? I am a 59-year-old female. Thanks for any input/suggestions.