I would recommend that anyone dealing with hypothyroidism to get a copy of Dr. Brownstein's books, especially "Iodine: Why You Need It; Why You Can't Get Enough". The book is illuminating. And I'd recommend you get a pure iodine/iodide supplement like Iodoral or Lugol's which is in liquid form. And read everything on Janie Bowthorpe's website:
https://stopthethyroidmadness.com/
I recommend her book as well.