Seriously, don't be embarrassed.
My first road test I failed MISERABLY. Like, I don't even think I can explain how much I messed up on. I was so nervous, and I had never really practiced, and it was all just a giant mess.
The guy giving me the test actually asked if I wanted to get out of the car so that he could drive back. THAT'S how bad I did.
And I never cry in front of people, but I started sobbing alone in the car with this random man. I was just like, "I SWEAR I can do this, I'm just so sorry, you must think I'm the stupidest person ever!" I feel bad for the guy, he was just like, "Uh, well, I mean, it's okay, you can take it again..."
But yeah, the experience was humiliating and really emotionally draining, but now I look back at it and it's something me and my friends can laugh about (I mean, making a left into the WRONG LANE? Really?!)
But don't let it bring you down, and don't feel bad about getting so emotional about it. Like I said, I really never respond super emotionally to anything, but that really made me break down. It's just a really strong mix of emotions. Good luck on your next test, I'm sure you'll do great!