A doctor put me on two types is thyroid medication, Synthroid and Nature Throid. So I took the meds as prescribed for a few weeks but then I started to feel sick. I ran a low grade fever, got very hot and then sometimes I would freeze so bad. Also I got very lightheaded and jittery feeling, irritable and just very tired. So went to see my primary doctor and she tells me I don't even have Hashimotos. That according to all the test results from the first doctor, which I showed her, they were misread. I just don't understand how two doctors could come up with such different conclusions. But I still think I may have hyperthyroidism. Can someone help me sort it all out?