Definitely get a PANS specialist involved, especially if he is not too far from you. Many local doctors still don't have enough information and some of the information is very new, including the criteria in diagnosing PANS, which was recently updated in March 2012 to now include Mycoplasma among other triggers, not just strep.
That being said, last year, my DS9 had Mycoplasma and, soon after, started having very similar symptoms of hoarding, repeating, dark circles under the eyes and lethargy. Mycoplasma, at the time, was not yet on the trigger list, so when I suggested to our pediatrician that it may be PANDAS because of the sudden OCD symptoms, he ruled it out after the strep culture/bloodwork was negative. How unfortunate! It took over a year to get the correct diagnosis and treatment and with an out-of-state doctor no less! One thing I did make sure of was to provide our pediatrician with a copy of the latest NIMH findings to avoid this from happening again.