@trulyslim, your doctor should've gave you a paper to sign to test for chromosomal abnormalities like Down syndrome and stuff. That's when they also can run a separate test for gender. However, some insurances don't cover the gender part.. It's pretty expensive... However, mine did.
I paid out of my own pocket to get it done at an ultrasound place. You can do the same if you don't feel like waiting. I'm waiting for it to be confirmed during my 20 week scan in June