The singer, who performed his number one single 'When We Collide' at last night's ceremony, said that he had forgotten in a month how scary it was to perform on live television.
Speaking on ITV2 at the awards after party, he said: "I'm quite relieved it's over. It brought me back to the whole X Factor experience with the whole live TV and massive audience.
"It's only a month or so, but you get used to not doing it again. Of course I was nervous. You've got to be nervous when you do something like that or there is something wrong with you."
Cardle said that he was "chuffed" that The X Factor took home the 'Best Talent Show' gong and revealed that he was already working with various producers on his debut album.
"I'm in the studio right now and I'm working with some amazing people," he said. "Just recording the album, writing the album and going in the right direction with it."
Joking about what he would have been doing when last year's NTAs took place, he said: "Last January, I'd have had a day in the skate park, a few beers and probably wondered what I was doing with my life."