Muscle stiffness, weakness, painful feet, body out of balance, losing patience ;)

I have been struggling with muscle stiffness and weakness. I've been trying many different kinds of magnesium, but it's still persisting. Another thing is last summer I developed plantar fasciitis (heal spurs, foot pain) and got it to go away by trying some various things like MSM taken with hyaluronic acid or 10 capsules of 1,000 mg fish oil. Also fasting one or two days a week. I'm guessing these remedies were affecting my body chemistry and lowering inflammation at the time. But now it is coming back again since taking iodine. And today I also seem to have muscle weakness. I have already lowered my Iodine dose to 4-6 mg because of they hypothyroid symptoms I was getting when I would increase above that amount.
At this point I am having serious doubts about continuing on with the Iodine supplementing or possibly trying kelp since it seems to have a lot of magnesium in it also and smaller amounts of iodine.
I just don't know what to do anymore. I am really getting frustrated.
I figure what has happened is somehow the Iodine has thrown off the balance of minerals, electrolytes - whatever (I really don't know - just guessing here!) and I can't seem to figure out how to restore it. I've tried the salt flush, and eating of Sea Salt . I even bought some concentrace stuff, used a smaller amount than the recommended dosage and felt far worse and woke up with extremely swollen and bloated face and hands and a couple pounds heavier on the scale. So, needless to say I didn't take anymore of that! And it does not state everything that is in it.
And the magnesium makes me tired if I take it during the day and if I take it at night I can't sleep.
This is what I take:
4-6 mg iodine a day
selenium yeast
vit C
B- complex
magnesium (I've tried, mag citrate, mag malate, and mag chloride)
I eat softly cooked eggs probably every other day cooked in coconut oil. I eat Sea Salt with food.
What is left for me to try?
~ Taking a break?
~ Potassium?
~ Other?
~ Screaming and giving in to insanity?

Any suggestions? Anyone else go through this and find something that helped?

Oh and by the way, I appreciate all the help you guys have already given me. I am sorry I come here and complain so much. I know you guys are all a bunch of sweet hearts who so patiently try to rack your brains to help people. Tweet