I have been on iodine for two weeks but my head keeps feeling weird and I need to lie down several times a day.

Yes, I felt just like you do. I had terrible brain fog, confusion, fatigue. I know what you're going through. And what you're feeling is completely normal. But you are now probably taking too much iodide and going too quickly. You need to back down to a lower dosage of the iodide and stay there for a longer period of time. You are probably very deficient.