Headaches and anxiety can easily start when taking I. Are you taking companion nutrients, they are equally important to the whole supplementation of I?
PS. I take SSKI from trapper, it seems to work better than the I2 for me from sources like Magnascent, personally. I started with Magnascent, to wean up slowly. Currently, 4 drops of SSKI do the trick for me in water. Good feelin', plenty o' energy, warmth, etc... Detox symptoms are low, almost none now after a long time suppin'. It's been a gradual diet change too, removing garbage and replacing with good eats.