5 drops of 5% Lugols should be 6.25mg per drop for a total of 31.25mg of total iodine. this is well under the 50mg used as the daily intake of the patients of the doctors in the Iodine project. this amount still causes the problems you mention.
i find that 100mg of Lugols per day helps get past these rough spots.
im assuming you are getting Bs and C and selenomethionine and etc.