The Reds have had a slow start to the season in the Premier League.
Carra said: "There is still a long way to go. Though we have not started great in terms of results, there are a lot of things to take into account and this is a transitional time. But we have just got to remain positive.
"A few wins and everything will look different. We have got two home games coming up in the Premier League and we need to make them count. We've had a great start in the Europa League and we just have to make sure we keep on believing."