When I have to stand still I find it difficult to stand upright. I just feel weak and need to sit down. But I am fine walking although it takes me a few minutes to get up to speed at the start. I also find it difficult to stop afterwards and feel the need to keep going. My TSH is 1.37 and T4 is 12. The doctor won't test for anything else as says in normal range. On 25mcg levo. I have a deep voice some days. Any ideas would be appreciated. I do have low bp, resting heart beat of 50 and temp of 36.4.