Iodine supplementation and shortness of breath.

I have used Iodoral off and on at doses of 12.5mg up to 50mg for about 10 years but never with the salt and companion nutrients, and never saw any improvement in anyway. About a month ago I started with the salt and companion nutrients and finally started seeing some of the relief I have always hoped for - reduced fibrocystic lumps, increased energy, reduced fatigue. I started at 50mg and got a lot of detox symptoms so I bumped it up to 100mg and the worst of the symptoms subsided. But I developed a shortness of breath so I dropped back down to 50mg and it seemed better, but I noticed my fibro lumps coming back. Just this week I went back up to 75mg and now the shortness of breath is back. I have researched this site extensively and have found everything from not enough magnesium, C, or Selenium, to Iodine toxicity, yikes, so at this point I am at a loss for how best to move forward. Any advice is greatly appreciated.