I haven't taken my levothyroxine for 3 days now and the palpitations have stopped but am getting tension headaches. I just saw a nurse practitioner and she was no help what so ever even after telling her. I have low blood pressure and have been feeling tight in my back around my ribs (especially my left side), some bloating in my abdomen, occasional quick stinging pain in my extremities, EXTREME IRRITABILITY, tightness in my left knee joint where I had ACL surgery a year ago, and just overall tired. Please help because the nurse did nothing and told me nothing other than send me for a complete blood work up.