I Had the same thing happen after taking iodine. I have candida too I'm pretty sure. (stained white tounge)
Ive had plenty off neurological symptoms since, depression, memory loss, confusion, loss of motor skills ect. Its probably extreme die off.
One thing you have to watch for is your immune system. My doctor seems to think I gave myself some type of infection similar to lymes disease because my body wasn't ready for the die off.