@tiredandthristy
It seems you are subclinical hypothyroid. Your thyroid gland is not making enough thyroid hormone needed and working extra hard.

Taking iodine can be dangerous.

I take levothyroxine for hypothyroidism after lobectomy. I am doing fine on the medication. I also have Hashimoto’s thyroiditis. Have you been tested for thyroid antibodies?

1. https://www.aafp.org/pubs/afp/issues/1998/0215/p776.html
2. https://www.thyroid.org/ata-statement-on-the-potential-risks-of-excess-iodine-ingestion-and-exposure/
3. https://www.mayoclinic.org/diseases-conditions/hypothyroidism/expert-answers/hypothyroidism-iodine/faq-20057929
4. https://ods.od.nih.gov/factsheets/Iodine-Consumer/?c=youdoyou