My therapist would probably agree with your therapist. She's said a similar thing (only without the anger), which is that it's not possible to diagnosis until the ptsd is resolved (or less intense) because its symptoms are similar to other disorders. I was diagnosed with biploar and on medication for years. While seeing this therapist, I got off the meds (she did not encourage or discourage it either way) and she was right. Dealing with the ptsd through therapy is lessening all those other symptoms that won me a bipolar dx and all the meds that messed up my body/brain.

So, while it's probably not what you want to hear, I think your therapist is right. His delivery sucks, tho.