I've heard Murphy is mainly good for diagnosis, not so stellar for treatment. You have 2 leading PANDAS physicians in Texas. I would not recommend travelling to the East Coast in your case.
Here's a provider list (by state) from Pandas Network http://www.pandasnetwork.org/research-resources/us-providers/
Dr. Sesgagiri Rao (Leading PANDAS Physician) Immunologist 972-964-7374 Plano, TX will treat more complicated cases involving PANDAS and Autism
Dr. Bruce Russell (Leading PANDAS Physician) Pediatrician 361-749-1930 Port Aransas, TX May not be accepting new patients. Will treat more complicated cases involving PANDAS and Autism