You can call and ask your dr, there are different brands but if you tell them blood test they'll understand. It's aggravating to wait that's understandable but just be aware that you'll have to pay for the test they're not covered by insurance unless you're 35+/have a high risk pregnancy. My doctors office was going to charge close to $200 for it, and doing it on my own was about the same price.
If you really can't wait and don't mind spending the extra cash a cheaper way would be to go to a 3D ultrasound place for a gender determination screening which average around $80, that you can schedule yourself