Has anyone ever experienced joint pain while detoxing?

I haven't confirmed my mercury toxicity yet. I just ordered Dr. Cutler's first book and will probably order a hair analysis test soon from Doctor's Data. I am seeing an ND for adrenal fatigue, and my neurotransmitters are low. She has me on a protein detox shake mix called MediClear by Thorne Research. I get awful joint pain from it, and I never experience joint pain before. Any info is greatly appreciated!

O. Mary