Its quite common(in fact) for Miracle-Mineral-Supplement to cause lethargy at the introductory stages of use. And the duration of the effects can and do vary from person to person, but the average seems to be around 5-7 days. After which things return to normal.
Some people believe these are the effects of detoxification, but I'm not really convinced of that. Whatever the case, the generous consensus is that it will pass.
BTW, you do realize that you posted your thread in the Miracle-Mineral-Supplement DEBATE forum and not the SUPPORT forum right? I too made this mistake by place my introductory post here also. And of course, it was met with a the usual Conspiracy theory nonsense that follows in forums as as these.
With this in mind, I'd recommend that you re-write your post in the support section in hopes of getting more help than are getting here.