I just discovered this thread after posting a long message querying people's experience with body pain associated with clonazepam--so I'm NOT alone! I didn't really think so, but . . .
Anyway, I want to support what's been said about diet--this is really crucial. I've had to pare my diet down to a nearly absurd set of restrictions because of a separate issue, but I think the incidental result (a limited, but much more balanced, diet than I had before) may turn out to be that I'll sense some alleviation of the joint pain and other stuff that I suspect so strongly of being related to clonazepam use and withdrawal.
The other thing is, don't forget to breathe. Make a point from time to time of breathing slowly and deeply for a minute or two--the extra oxygen can really help. And consider mindfulness meditation. I've already gone into this in detail elsewhere, so here I'm going to leave it at just making the suggestion. But think about it.
Good luck, everyone -