My psychiatrist sent a letter to my GP saying how urgent it is that I get an ASD diagnosis. How long do you think it will take? Do you think my psychiatrist's letter will speed up the process? I am an 18 year old female. What kind of help will a diagnosis be? What kind of support will I get? I have great difficulty with change and missed many years of school because of this. I want to do my a level exams but every time I tried I didn't go last minute because the anxiety was too overwhelming. My life is ruined. What kind of therapy can I get to help force myself to adjust to a normal life? Please respond. I am so desperate. I really need help.