Aitor Karanka said that his side need to keep believing in themselves as they get set to welcome Barnsley to The City Ground on Easter Monday.
The Reds' unbeaten run came to an end against Millwall on Friday and Karanka is looking for a reaction from his side in front of the home fans.
He said: "It is a chance to respond. I said the same thing after the game against Preston and against Hull in the FA Cup, that I was expecting a good reaction and I hope that this is the last one.
"We can't forget that we had been playing well before Millwall so we have to go out on the pitch, play the way we know we can and hopefully we can have a good reaction.
"We need to create more and be more aggressive. We have done nothing yet, we need to keep going as to get promotion or get in the play-offs you need to go on longer runs than seven games unbeaten.
"It is about the team and about the desire. When we do the things that we know we can do, we can win. It is about believing in what we do, to keep going and to be aggressive."
Karanka added that he learned a lot about his side from the defeat against Millwall, especially as they conceded within the first minute depsite working on tackling The Lions' strengths throughout the international break.
He said: "I have learned a lot as it was a surprise. Since the Preston game, I have been pleased with the players. Then we had two weeks to prepare for the Millwall game, and they don't have many different traits apart from long balls, crosses and aggression, and after 30 seconds we concede.
"It is difficult to understand but it is better that these kind of things happen now so that we can learn from these games."
It is now four games without a goal for Forest and Karanka knows that his side need to start taking the chances that come their way.
He is yet to decide whether to make changes to the side for the Barnsley game, but feels that the alterations he has already made haven't delivered the goods.
He said: "I need to think to see how the players are as the Millwall game was tough. I don't want to change a lot of things as the team had been doing well.
"I made four changes against Millwall and we finished with three at the back and two up front. We had two up front against Sheffield United; I have tried many things.
"I will keep trying as it is my responsibility. We have the squad that we have and we have to play our best. We will have games like against QPR where we score five goals and we will have games like against Millwall or Sheffield United where we have chances but don't score."