Blood Test

Sophia • Proud mom of a handsome toddler.💙
Hey ladies, good morning 😊
I was wondering, I went to the doctor last month for a blood test, they took quite a lot of blood to determine some things about the baby, including gender.. I am 20w5d now. They told me the results will be back within 5 days, I really want to find out the gender so I can start buying things with my SO. 
Can I call the doctor and find out now? Or do I wait til my next scheduled appointment? 
Thanks guys.