If it is purely just sleeping issues, there is a GREAT chance you will get a Z-Drug like Ambien or Lunesta.
If you say you're anxious, your heart races and anxiety is through the roof so you can't sleep etc. you will more than likely get a benzo. Giving you a Z-Drug would be useless in this case, so that's their next line of choice.
In that case he can only go by what you tell him, and oddly enough, doctors have no problem handing out benzos at all, which is so hypocritical. People in legitimate pain get sent home with Tylenol 3, while benzos which have the most horrible withdrawl that can downright kill you, and send you into seizures are prescribed like nothing. I am warning you man, you might really want to reconsider trying to get into benzos. Do some research on the issue, they are horribly addicting, and have the WORST withdrawl of anything. PAWS can last for over a year after addiction to them