How to get adderal XL (because I actually need it)

okay, I have raging adhd. I have it slightly under control, in that I manage to make money at poker, and do well in school, and function semi normally.

However it is clearly effecting me, and my life would be much better if I had some (i.e. I'd be able to grind out more poker, and be cable to concentrate more on school projects).

I paid $500 to UTexas research to test me for ADHD... and the guy tested me for over 12 hours, and then said he concluded that while I showed definite signs of the disorder... I was trying too hard???

So now Im out $500, and really want this perscription. And Im unaware of another way to go about legally getting it.

I really dont feel like shoveling out $500 again and getting the same results.

Can anyone tell me how they got theirs?