My past couple of t's have been skeptical at the beginning that I have a bp diagnosis because evidently in therapy circles the feeling is that we're overdiagnosed. In both cases, it didn't take long for me to make converts out of them! My latest t is amazed at how hard the cycles hit me, and how often they come.
Therapists aren't medical doctors. I would trust what the psychiatrists have told you.
Bluemountains