Looking for answer about thyroid issue. Was on 175 mcg Levothyroxine and cannot seem to loose any weight despite how much I exercise or eat clean. My endocrinologist has increased my dosage to 200 and prescribed Cytomel. I have read a significant amount of information that the side effects of Cytomel can cause headaches, rapid heart rate, etc., I am seeking a little insight on this. Should I have hormone testing done as well? I am trying to determine what is wrong with my system in that I cannot loose weight. I am just confused on what to do and whether or not my doctor should perform additional testing. Any advice would be helpful. Thank you!