The Reds' faltering title challenge took a further hit over the weekend with a 2-1 home loss to Leeds United.
That defeat continued an inconsistent start to the domestic season for Liverpool, who have already lost four times in the top flight.
Liverpool sit ninth on the table and are already 15 points behind leaders Arsenal.
Up next for Liverpool is a trip to North London to face Tottenham Hotspurs on Sunday, and Alexander-Arnold wants Jurgen Klopp's side to get back on track against Antonio Conte's men.
"I'd say we all believe in ourselves, we believe in the way we play, the squad and what we can achieve," the right-back told the club's website.
"But I think when you do get setbacks, it can potentially make you second-guess yourself and question things.
"Clearly as a team something's not going right, it's not going as well as we want it to go. That's something for everyone to think about, for everyone to address and make sure we put it right, especially next week against Spurs, top-four rivals.
"We kind of need to go there and get some points if we've got any chance of reaching our aims and aspirations for the season."
"I think we are not in the greatest run of form – I think a lot of players would say that about themselves and as a team in general," he added.
"But we're still creating opportunities to score and win games. We just haven't been able to take them, especially [in the] last two Premier League games.
"I think it's important for us to regroup, assess what's going wrong. I think right now, it's kind of, 'pick up as many points as you can now going into this break [for the World Cup].
"And potentially this break will come at a decent time for us to reset and be able to get our heads straight to go into the second half of the season."
