Im glad you are going to see Dr. B. He will help run all the tests but I want to tell you that what a lot of us have discovered is that this disease...(call it what you want, PANDAS, PITANDS, PANS)can be triggered by many different or multiple infections. For some it can be strep but for others there have been layers of infection that triggered the illness. I just want to encourage you to rule out all chronic infections including strep, mycoplasma, lyme, bartonella, and babesia. Lyme, bartonella, and babesia are all tick born infections that need to be treated with a combination of antibiotics by a skilled lyme literate doctor. It isn't as simple as treating for strep if your child is infected with one of these infections. Some of us on this forum went with the PANDAS diagnosis but when our children did not respond to appropriate treatment, we were forced to dig deeper and look at some of these more complex infections. Dr. B will run the labs but I would insist that he check for lyme and co-infections via IGENEX, a tick born disease specialty lab. Lyme testing is complicated and the standard tests run by Quest or Labcorp are not adequate when trying to rule out lyme. I don't want to overwhelm you with information right out of the gate but your post made me suspicious of lyme. Given that your son is experiencing issues with his thyroid and that you live New York, a lyme endemic area of the country, I think it's important that you look at all of these possibilities. We wasted a year on PANDAS treatment before we discovered lyme disease in my daughter and I wish I would have known then what I know now. Please check out the lyme forum. The folks over there will answere questions too. In the meantime I think going to see Dr. B is a good start.