Side effects of iodine

Hi all- First I want to say this board has been a lifeline of knowledge and resources and I thank you all! I started to supplement with iodoral about a month ago! I started slow with 1 12.5 MG pill a day for a week! Then 2 pills 1 in the AM and 1 in the PM. Now for the last 2 weeks I am taking 4 pills split into AM an PM. Could this possibly be too much. I am a male . 58 years old and have no major health problems. I take a drug called Exforge 160/10 for hypertension and .25 mg of xanax twice a day(I am starting to cut this down slowly) I work out at the gym on the elyptical 35 minutes 3 times a week plus free weights. Supplements I take pretty regularly are as follows:
Vitamin D3 2000=4000 Mg a day
Vitamin C 1500-2000 Mg a day
Lifesource Multiple
Co-q10 100 MG a day
Calm Magnesium
ACV
Flaxseed Ground= 2 TBL a day
Raw Adrenal

I had a very stressful job and am now retired. Doc said my adrenals were pretty well shot. Had a terrible bout with chronic fatigue in 1990. All of my bloodwork is within normal ranges except cholestrol- Total is 174
but ratios are inverse and triglycerides are slightly high.
I feel ok most days but not all the time. This morning I was light headed. Could the Iodine be causing this. All of my thyroid tests were within normal range with the TSH being 2.6. My diet isn't the best but it is far from the worse. Fruit, vegetables, whole grain-almost no fast food or boxed food- no nitrates or hydrogenated oil! no tap water! Drinking Kangen Water ! No coffee(Some tea)
Need some input here!
Thanks in advance