I had another appt with my endo. She said my symptoms sound like Graves but would do more blood work. I had not fasted and took all of my meds that morning. It was about 11:30 when they took blood. Does time of day effect your TSH level and can any prescription meds effect your TSH level? Also, I read an article recently that said a calcium supplement could skew your TSH levels. Is this only if you are already on thyroid meds, or is this anytime? Any info would be helpful, I think I'm dealing with an uninformed endo.