The Lions are among a clutch of teams battling against relegation from the Championship, with just four points separating them from the drop zone.
However, Jackett said that he has no regrets regarding Millwall's run to the semi-finals of the FA Cup, where they lost 2-0 to Wigan Athletic.
"Three of our remaining matches are at home and we have to make that count," Jackett said after the match. "Our cup run hasn't helped and it's been a strange season.
"If we'd have got results over the last five matches, we'd have been looking at the playoffs. That's been the story of our season. If we won a couple we were looking up, but a couple of losses and we were looking down.
"Early in the season we were fourth or fifth in the league and then in the second half of the season we were looking over our shoulders. Having said that I wouldn't swap the cup run for anything."
Millwall have two games in hand on their relegation rivals.