Thank you for your question. Although without being able to examine you I can not offer you the specific advice on diagnosis and treatment that you need, but I would try to provide you some relevant information about your health concern.
If every reports came back normal then these tingling symptoms could be associated with fatigue, stress, anxiety or a form of panic attack. Other possible causes of this could be overactive thyroid, certain medications, alkalosis, and low blood sugar. Sometimes previous injury may cause pinched nerve and may be a reason of numbness. Therefore, it is quite essential to thoroughly assess the all possibilities here with the help of a doctor. Hope this helps.
I would request a different lab and see if there are more thorough tests for the thyroid and make sure you have had multiple other blood tests to rule out other causes.