These certainly could be detox symptoms. Sometimes the salt push/flush helps with these. Try 1/4 tsp. of unrefined salt in 4 oz. water and see if this helps.
Some people also find that increasing the Iodine helps. I know this may sound counter-intuitive, but people have said that getting to 50 or 100 mg can help them get past all the detox quicker. Sometimes the detox comes in waves, too, over a period of months.
I'm not all that familiar with Iosol, but I was thinking that this was a form that didn't have all that much Iodine in it. Lugol's or Iodoral may help you get to the 50/100 mg of Iodine quicker.
The additional symptoms that you are experiencing don't mean that it's time to quit. It's confirmation that you need to keep going :) It will take months or years for your body to make use of the iodine, but it won't necessarily take that long for you to start feeling better.