In addition to what Feo said, you're supposed to take Iodine with the companion nutrients, like selenium, or yeah, it will damage your thyroid, as far as I know.
I can't tell if you were doing the companion nutrients by reading your posts.
You said:
"since 8 months ago i have been supplementing a lot vitamins and minerals."
And you also said:
"I just took Iodine by itself... with no other things..."
Iodine also displaces other halogens that cause an increase in problems. That could be your problem too.