My Psychiatrist, Group therapist and individual therapist all communicate about me to each other. I believe that Having them working as a team has been extremely helpful to me.

As for diagnosis, I wouldn't worry too much. I have two different diagnosis that they all don't agree on but the Meds can be used across the different diagnosis. If a med doesn't work you try another. It's not an exact science like this specific med only works for this specific diagnosis.