A lot of docs are hesitant to prescribe stimulants. They're the most commonly abused prescription drug right now, even more so than narcotics, so doctors are pretty cautious. Psych appts are often so quick and so rushed and there's often so much to cover. I think you'd be better off getting an appt with a psychologist (a phD preferably, in most states, the clinician has to have a phD in order to diagnose ADHD or learning disabilities) or a neuropsychologist. They have a phD by default. Let them know when you make the appt that you're making the appt specifically to be tested for ADHD so they can plan for the appropriate time and be prepared with the correct materials etc.
I would also caution you to be open-minded. A lot of syndromes have overlapping symptoms, so try to be open to the possibility of whatever diagnosis they suggest. If you really don't agree, you can always get a second opinion, but just be open minded. Good luck.