You've done so much good for yourself. I feel very proud of you. Based on my experience, I agree you probably have little to fear of breast pain again. But if you can, consider NEVER going totally off iodine again. When you're ready, you might be able to lower your dose in stages, to see at what level of iodine your breasts continue healthy. If you go under that, the pain will return because you won't have enough iodine to counter the continuing assaults of modern life. I think also that your lymph system got overloaded at one point, and the nodes got inflamed, but you've gotten past that. Congratulations!
Should you decide to get thyroid testing, be sure not to take any supplements, especially iodine or iron, the morning of your test. I have made that mistake, and either will wreck your numbers and waste your money and time. Just so you know, my experience with Iodoral and goiter was that iodine never decreased my goiter. My goiter never went away until I was on thyroid hormone. Everybody's different, but you might keep that mind.