Sounds like you are having similar symptoms to me when the Iodine has loosened the fluoride up out of the body and it is swimming around in the blood. A salt push might help right off.. and of course Iodine supplementation is an excellent follow up step.
Salt push/load - 1/2 teaspoon good Celtic or Himilayan salt in a half cup warm water
Chased by another 12-16 ounces water.
Be sure to read the FAQ above to start. Wombat's Iodine 101 is great.