I bought iodine which helped at first. I’m still on 50mcg. But now I have a bit of a headache and it hurts to move my eyes around. And I feel depressed and sad. What do I do?

Headaches and low mood are some common reactions I see when people start taking minerals that they're deficient in. Sometimes people feel fine at first, and then they get a delayed reaction later as the mineral starts to build up in their system. 

When a reaction happens, I recommend taking potassium gluconate to manage the reaction, or drop back down to a lower dosage. Since you are only taking 50 mcg, I would suggest taking a break from the iodide until the reaction symptoms subside, then start taking it again. Just back down, then reintroduce. And take additional potassium if necessary. But you should keep taking it because a reaction is a sign that your body needs it and it's affecting your biology. People who are healthy and not deficient in iodide would notice anything from the supplement. A reaction is diagnostic. So I would keep at it. It will be interesting to see the results of your hair test as well, as that will give me more information.