yes that happened to me on the 3rd day on 15 drops twice daily on my first course.
Stop Miracle-Mineral-Supplement till you feel better and vamp up on your and antioxidant supplements. Take a break from Miracle-Mineral-Supplement .
I am sure you killed a big deal of bacteria. When you feel better, just put 2 drops of unactivated Miracle-Mineral-Supplement in 8 ounces of water or in your tea for 4 or 5 times daily. This will help in suppressing the the new growth of bacteria, till you feel ready again.
By the way drink lots of water to help to wash down.
Try to be prepared when you try again, like on a holiday when you don't have to work.