Kompany admitted the dramatic ending was almost too much for him.
"You want to say it's the best moment of your life but, if I'm honest, please never again this way.
"Even though the first half was really good we just couldn't get through."
Kompany insists he never lost faith, though.
"I never stopped believing," he said. "When Edin scored that goal, it reminded me of so many other moments during the season when we've done this before. There was no reason not to believe.
"It's not sunk in yet. I don't know what happened at the end, it was just a huge mess.
"I'm so happy for the guys cos they've given so much this season. We've dreamed of this all our lives and now we're champions. See the fans and how happy they are - unbelievable."