How long will it take to rebound after taking hypothyroidism medication to being diagnose to hyperthyroidism? I have been sick for about 2 1/2 months, not sleeping, losing hair, itchy, sick to my stomach, etc, I finally went to the er this morning to find out I went from being hypo to hyperthyroidism. I have been taking Simvastatin all along not realizing my thyroid was the reason I was so sick. They told me my level this morning was .01 I am concerned how long before I get back to a normal level