"There is no point in me going in the dressing room and telling the players it is okay to draw, because it is not," said Magpies boss Cotterill.
"The dressing room is a sombre place right now because that result feels like a defeat. It was a cruel blow to concede so late and a kick in the teeth, but it is not the end of the world.
"Since I've arrived at Meadow Lane we have moved from seventh to third in the division with four consecutive wins and we'll recover and go again.
"Overall we didn't deserve to win because at 2-1 we sat deeper and deeper and invited more pressure on ourselves, which eventually told."