EDIT: Considering you had only a very recent change, I'd be investigating the circumstances around what happened to you over thanksgiving. A parasite cleanse, fast or stronger intake of anti-virals may be in order. I'd personally take time to pray/meditate for an answer to what has occurred to cause the symptoms you're seeing, and for what to do.
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Hiya! Yes, Iodine definately changes your thyroid levels. You could call your metabolisim our iodine-regulatory system, even.
The real key to success on it are the co-factors (nutrients that help it work).
I would definately pause the Iodine for a week or two, refresh your reading on the helper nutrients, and start again once you start to find the balances needed for your system.
Selenium especially protects the thyroid against damage while generating thyroid hormones, by helping neutralize the ROS (reactive oxygen species/particles) generated in the process.