The Owls fell to their worst home defeat in nearly two decades in the 5-0 thrashing, ending a run of impressive back-to-back away wins against Brighton and Leeds.
They slipped to 10th place in a congested Championship table and have now lost three home matches on the spin.
But it’s a situation played down by Reach, who suggested Friday’s trip to QPR is just the tonic the side need to get back on track.
Asked about the mood in the changing room after the Blackburn defeat, the former Middlesbrough man reported a focused group more than capable of roaring back to winning ways at the first attempt.
“The dressing room is fine,” he told The Star. “The world has not ended. We are still in a good position.
“We know what we need to do and to get back to basics a little again.
“I am more than confident we will put a couple of wins together and get back in the play-offs and go again.”
The match is seen as a keen opportunity for both Wednesday and QPR to progress to the fifth round and the Owls are expected to take a full strength team to the capital.
Fernando Forestieri is expected to miss out but there may well be a return to action for Liam Palmer, who has sat out with an ankle injury since the defeat to Cardiff on December 29.
And Reach suggested the fact it’s a cup game matters little.
“It doesn't really matter,” he said. “I just think we need to win.
“We went to Brighton and put in a really positive performance and we took the confidence into the Leeds game and we all know how that went.
“Maybe another cup game is what we need away from home where we have been good. Hopefully we will get another positive performance.
“We need to react like we always have done and win the next game.”