Tom Kennedy is hoping that the Reds can do the double over Yorkshire derby rivals Huddersfield this weekend.
Goals from Chris O’Grady and Marcus Pedersen earned a 2-1 win against the Terriers at Oakwell in August.
If they can win on Saturday, Barnsley will also have strung back-to-back wins together for the first time in nearly a year.
“It’s all about momentum – and we know a couple more results could really see us move quite a few places up the table,” Kennedy told The Star.
“You could see the relief in the dressing room after we beat Millwall (1-0 at home last Saturday).
“We needed a win, but the relief was also because we’ve been playing well and maybe been a bit unlucky we’d not got a win before the weekend.
“We felt we could have beat Doncaster and played well against Ipswich and only came away with a draw.
“But we know it (the win) was coming and it’s given everyone a big boost. We want to go to Huddersfield now and get another because we’re all feeling confident.”
The Reds have lost only one of their last four matches and are now two points adrift of safety. They have 15 games in which to secure their status in the second tier for an eighth successive season.
“We thoroughly believe we can stay up,” Kennedy added. “The confidence never really went away; it’s just been tough when we’ve not been getting the results we’d have liked.
“When we’re playing well, we can take on any team. We’ll be looking to beat Huddersfield. It’s a massive game for us.”
Meanwhile, academy scholar James Bree, aged 16, has signed a new three-year deal.
Right-back Bree, who snubbed Manchester United to stay at Oakwell, has agreed a two-year academy scholarship extension and a one-year professional contract on top of that.