If your panel comes back within the ‘normal’ range and you’re still feeling yuck, a change in diet and exercise is your best defence. Iodine supplements are great, but remember to eat food high in B vitamin also. The way I remember it is, B is for Blood and if I feel tired, my blood isn’t carrying the food and oxygen it should around my body. Vit B’s help. (as well as enough Iron, but you can take iron and still get forms of anaemia thru lack of vit B.)
I have the opposite problem. I have Graves and am currently in a hyper phase. It’s icky. I’ve spoken to many fellow ‘warriors’ who are now hypo because of the RAI treatment and many of them swear they are hypo even though their panels show that they within the ‘normal’ range. The truth is, our endocrine system is a very complex thing to balance and just taking a pill that is a synthetic of one hormone may not be the miracle cure for everyone. They do know what happens when people need the pill and don’t take it so it’s important, but still may not cure all the symptoms the person is feeling.
Read everything you can about what is going on in your body and start to use food and exercise to improve your condition.
Best of luck and I hope you feel better soon.