Hi, and welcome to this forum.
From your list I have had IBS and FBD. Both gone.
Just now I have not the time to go into details, the others will chime in, but I can answer some of your questions.
-your dosage 4-5 mg is not enough to start a major detox.
-salt loading; I did it a year before iodine, had great benefits. I would do it regardless.
-The dosage is individual; for me not much happened until I upped to over 50 mg, 10 times of what you take.
- improvement; when you are up to the right dosage, improvements like better energy and well being could come within days, weeks. Individual.
I have a general rule that one need one month per year of illness to get well; that is if one has the right protocol of course. Most cases I say 1-2 years, less for children, depends of the severity of the condition.