Gender Blood Test?!


Hi ladies...I am 13 weeks and 2 days and I had my OB appt on Tuesday...she offered a test that check DNA and abnormalities and also Gender but it was too expensive I called the lab and the test is $2,700...but I have BCBs insurance which they said the would have to do the test and then see how much the insurances covers...I was wondering if anyone knew if there was a blood test just to check gender? Im doing it because we want to be 100% sure what the baby is...I dont wan an ultrasound to come out wrong and have prepared everything for a certain gender lol!