There's a professional test one can take:

http://www.nctsn.org/content/trauma-...-inventory-tsi

but it costs money, takes time and a testing psychologist to administer it, etc.; your T could have been trying to save you two time and money. One isn't in the same outside world in the therapy situation so you might not display all your symptoms for one to observe or what is observed might be for a different reason in a session than in general.