Heavy Metal Cleanse Side Effects?

I have an autoimmune disorder and want to start the Universal Formulas heavy metal cleanse. I finished the LIver Gall Bladder Colon Cleanse a few weeks ago. I felt horrible for the first 1 1/2 weeks on that and I am wondering what to expect this time. I'd like to know what I should expect so I can decide when to start it.

Thanks to anyone who can help me.