The Magpies have been deprived of the services of playmaker Hatem Ben Arfa due to hamstring trouble - and he will be joined on the sidelines by suspended skipper Fabricio Coloccini.
Krul said: "It's just a bit of luck, I honestly think so. If we could just nick that goal and go on, I think we will win games. I don't think we have had a lot of luck at all in the last couple of home games.
"It is a bit of a rough patch and we just have to take it as it comes. We have got Southampton on Sunday then Stoke on Wednesday night.
"They are going to be two hard games, but we need to get back to the spirit and just stick together.
"It is and that's why we have to stick together. Last year, everything went for us, people stepping in, we were lucky with injuries to a certain extent. But this is part of football as well now and we have to get on with it."
Alan Pardew's side, who finished fifth last season, are currently lying down in 12th in the Premier League and are without a win in their last five games in all competitions.