There is a celiac clinic at the University of Maryland in Baltimore. Dr Alessio Fassano is the head of that clinic and is well known in the celiac world. So you could go there as an alternative to NYC. There is also a nutritionist named Cheryl Harris in Alexandria who works with celiac patients.
I am not surprised your antibodies are still a little high though. Going gluten free is kind of like learning to ride a bicycle, most people take few tumbles and get some scratched knees along the way. Some of the common issues are eating processed foods (that may have cc), taking vitamin pills that may have gluten, drinking coffee, tea or other things that may have gluten, sharing a toaster with gluten eaters, sharing cooking pots or utensils with gluten eaters, kissing the gluten eaters and not making a yuck face, sharing peanut butter, or other condiments with gluten eaters, and some people even have trouble with shampoos and makeup that have gluten in them.
Gluten can hide lots of places and it is easiest to just stop giving it a chance to slip in. That means not eating processed foods for a while until you get the hang of things. And many people have problems with dairy at first too and need to stop it for a while.
Pet foods can have gluten also and should be checked.