How to pass driving fear?

Hello everyone. Im 28 have 2 kids and i really need to drive in states as u know u have to drive, and just took driving classes. I didnt learn in 12 hours now i took additional 8 hours. I know every rule of driving and im very good when driving with my instructor with other ppl im nervous and making mistakes. i took dmv test and didnt pass. Everything is my fear of driving. Can anyone advice anything? And how to pass my fear? Share plz ur thoughts and stories. Update: wanna put little bit more info. So from beginning i had really bad feelings about that dmv coz while i was taking my permit i felt racism to me and to my son while visiting that dmv and i ended up to take my permit to other dmv. My instructor took me to the same dmv. This time when i went to take my road test i did a mistake from beginning by puting my right signal on while she was saying we r going to left and from that moment she made her discition to fail me, she said that after. And after that mistake she started questions like how long u have been driving it doesnt look like u r driving for long time this and that...and after that i felt that she will fail me and started nervous and made mistakes. So do u think should i go to that dmv or another one? My instructor advice me to go to that dmv to prove her that i can. But im not sure. What do u think?