How can you get your dr. to give you Adderall?

Well, hopefully you are asking the question in sincerity, and not just strategizing a score.

My best advice to you is to approach the conversation with evidence by which to support your argument. Write down all of the symptoms of ADD you are having over the course of a week or so leading up to the appointment. The doctor may still want to test you. If so, do as he says. Don't assume you are entitled to the prescription or even that you have properly diagnosed yourself. You may have a vitamin deficiency or something of the like, and that case another program of treatment might be necessary. A good doctor will do what they believe is helpful for the individual they have sitting in front of them.