I am actually in a similar situation. My therapist has labeled me with major depression and won't even consider that I may have other disorders even though I have symptoms that do not go along with depression. Her response to me was, even if you were diagnosed with something else what would that change? Well I think that would change quite a lot, especially my plan in therapy. She makes me mad. So I know how you feel.

I do not think it would be a problem to email and say what you feel or want from therapy, or to even say it during a therapy session. Also nothing wrong with finding a new therapists, sometimes personalities don't match and you won't get what you need from this person.

I made a list of everything I wanted to say or tell her and gave it to her during therapy. You could also look into doing an evaluation or psychological tests that will give you a diagnosis. Sometimes insurance will not cover these, they can be a bit pricey but they may help convince your therapist you have other disorders and need special treatment/therapy for those.