Huddersfield Town manager Peter Jackson admits he is concerned by his side's current run of poor form.
The Terriers are without a win in their last six league games, with their latest failure a 1-0 reverse at relegation-threatened Leyton Orient.
Jackson told his club's official website: "It was a big disappointment. I expected to come here and win the game and we came away with nothing.
"We had chances, with one hitting the bar and another being cleared off the line, but unfortunately we are going through a period where things are not going in for us.
"First half, they were the better side, but in the second half we were the better side and we were down to ten men for most of it.
"But, the longer this run goes on, the lower confidence will get."