wow... i don't even know what to think then.
i agree with trapper.. and ironically, i just made the same comment earlier today about it being a diagnostic tool because it brings out stuff that you thought went away or have no idea you even had. i had bad asthma and chronic lung inflammation that recently went away.. and since starting the iodine, my lungs flared into a mild chest cold.. so i'm assuming that's the Iodine purging the rest of the junk in there.
headaches can mean so many different things. i've heard of people having detox reactions to MSM and was surprised by that. I take 1000mg of it 3 times a day and haven't had any detox from it.
do you have any other symptoms that can maybe be a clue as to what could be going on? is it possibly sinus pressure?