Re: sore throat or what?
I do not know enough about this; but I believe you are experiencing a lot of detox symptoms.
For example, I know that when the lymphatic system is congested we get a "sore throat". The kind of pain you describe it is exactly it, because I had had it. This pain is not related to any cold necessarily. It is simply a sign our lymph flow needs to move better and expel toxins. Hence, any supplement or new discipline we embrace to get better, will bring some of it if our immune system is compromised.
The nightmares, as a result of iodine, ...just the same. It is said that we need to have nightmares once in a while to free ourselves from our negative traumas, conflicts, etc. In other words, people who are not able to liberate their mind in nightmares, as needed in their particular cases, run the risk of insanity.
Those nightmares I have experienced too. I know they are uncomfortable, but needed. I learned to deal with them, and only try to slow down my detox once in a while, when they are many and very bad, and I take a break then.
As I said first, not too much knowledge here, but it sounds you are trying to detox and rebuild at the same time. May be that is the root of your strong discomfort.