Since I started learning how to regain lost healh 5 years ago, and having gone thru various (at the start of raw foods, the worse detox I've ever experienced) detoxes, and healing events, imo what you had was a detox episode. I wouldn't be afraid of it, and while unpleasant and scary, I would continue on for just a day or two more..see what happens. If you can't stand it then back off, but at the first sign of major detox, try to go another day. Backing off detox is ok though, and gives your body a rest, then you can always go back to it.
I probably have lucked out in doing the parasite cleanse first, before I start the Lugols. You might try doing the parasite cleanse first, then adding back in the iodine.
You might also try doing some enemas. They are very good in helping along the detox, and you can do 3 or 4 of them at a time. When I first went raw, I did a series of them, almost daily for the first couple months, then less as time went on.