Therapists have to be careful about diagnosis. There can be a lot of ramifications of a diagnosis that may not be apparent at first. Some diagnosis can get you denied health insurance or significantly raise your premiums, cost you jobs and all sorts of things. I know that it is frustrating but taking it slow is the responsible thing to do. Even though I clearly had PTSD I carried a Dx of adjustment disorder for several years because it has the lowest potential for harm. Also once you have a Dx in the system they never really go away... even if they are later proven wrong... they can still come back to bite you.