You will not prove PANS by the expensive testing ....you really have to learn about it and observe symptoms. Probably the best thing you can do is look up the ATEC autism test which is online and takes about 6 minutes to complete. The computer will generate you a score immediately. Anything over 10 is considered on the spectrum. I thought my kids were not autistic but one tested at a 39 before MMS and the other at a 19. After 3 weeks on MMS, both scores dropped by more than 10 points. This went along with HUGE behavior improvements.
IMHO, there is no such thing as toddler obsessions! My son's OCD is GONE since starting MMS.