I you do a search on this forum, you'll probably see the various posts where I've asked about Miracle-Mineral-Supplement oxidation interaction, and it's rumored ability to "chelate" heavy metals.
It's been reported by Jim Humble, that Miracle-Mineral-Supplement is effective for "removing" heavy metals, but as you're about to find out, chelation is not something you want to approach by believing RUMORS.
For the time being, I would avoid Miracle-Mineral-Supplement and stick to a heavy vit C regimen, until your DMSA arrives in the mail. It's NOT AVAILABLE anywhere else in the USA than over the internet, as far as I know. So you want to order as fast as possible.
Take the time to sit down, and WRITE DOWN YOUR SYMPTOMS as they occur. Don't trust your memory, because the chief characteristics of mercury poisoning include brain fog and tiredness, and you may not BE ABLE to remember what you did later.
Make a journal with date, time, symptom, dosage, effects, columns, then just fill it out whenever you notice something or take a dose of something.