Welcome to healthcare Magic!
overdose with seaweed kelp must have repleted your system with iodine.
You shoul avoid taking iodine for at least 6months to come because iodine is needed in very low doses about 1mg can cover need of a week.
get a review to your physician with a thyroid
profile test now and after 6months. Your physician will know whether to give iodine or not and if at at what dose and for how much duration.
I hope the advise would be informative and useful for you.