I'm so sorry. Has a diagnosis and effective treatment been found since you posted this? I have fibromyalgia, a child with PANDAS, and an inlaw with parkinson's. I have met other parents of kids with PANDAS or PANS, who they themselves have developed a movement disorder, or one of their other kids did, often after an infection. One resource that may be helpful is the Neuroimmune Foundation (neuroimmune dot org). I believe they had a movement disorder specialist speak a recent conference. MS is even now thought to result from epstein barr virus. I actually think there is some common link among all of these conditions, likely genetic, that predisposes to post-infectious issues.