Don't take your iodine late in the day, as that can worsen sleep.
If you use kelp you 1) don't get a lot of iodine and 2) may be getting heavy metals along with it. Check your source
Lugol's or Iodoral are sources of both Iodine and Potassium iodide, both forms of iodine that the body uses. You can make Lugol's yourself. Iodoral is the same proportions in tablet form.