I do the exact same thing... it is detrimental to getting anything out of psych and therapy appointments.

I like to type out the issues/concerns that I want to cover and print it, give it to them because I usually go into shutdown mode. Even if you type like 3 pages that will only take them about 1-2 minutes to read and it kicks things off to where they will ask the right questions and stuff because they understand your concerns. Hope that helps.