"Well, I'm worried, of course. You can't come off a defeat like that and the manner it was without being worried," Pardew told reporters.
"I'm not going to criticise my players, I'm not going to criticise the team in any shape or form on an individual basis. It was a collective effort and we fell down collectively.
"We haven't become a bad staff or a bad set of players overnight. But we definitely need to roll our sleeves up and make sure we make a really good fist of these last three games."
Sunderland, Aston Villa and Wigan Athletic each have a game in hand on Newcastle in the fight against the drop.