Are you okay now? My husband had (yes HAD; doctor was not knowledgeable in thyroid disorders) and had him take two 150 mcg synthroid within 12 hours - because he was "so low" on his thyroid hormone. Well, raising so fast sent him into a thyroid storm. Not fun. Horrific. He is now switched to NDT and raising levels very, very slowly. It's a long journey, but I believe worth it in the long run. We are about half way there. Hope you are doing better now.
Did you suffer any ill effects? When was that?
Did you take that all in one day? How much were you supposed to be taking? Did you do that for just one day?