Here's somesthing that might make you feel better. When my hormones were going crazy and I was getting bad pms, my cycles were growing closer together until finally at the worst of it they were only 23 days apart. I'd have my period for a week, then one good week, then one week with the 7 dwarves (Bloated, Bitchy, Weepy, Tired, Swollen, Sore, and Touch-me-not) then it started all over. I was spending 25% of my time bleeding to death. Also, I was being saturated with estrogen 16 times a year instead of only 12.
But when I finally got a handle on it and fixed it, now they're back to 28-30 days just like when I was young. I think the Iodine IS normalizing your cycle and working on lengthening it out to where it should be. I think it's a good thing. Means it's working on getting all the kinks out and reversing the aging on your insides too. Longer is better ;)