That 2-1 loss to Graham Westley's Boro was the Bees' third in four league outings as the side tipped for promotion before the season had a slow start to their campaign.
But since then, last year's play-off final losers have won all five of their league games - conceding just two goals along the way - and have a mouthwatering clash away at leaders Wolves on Saturday.
Button admitted the club took a long hard look at themselves after the defeat to Stevenage and it helped create an upturn in their fortunes.
"I was gutted after Stevenage," he told Bees Player.
"It was a turning point for us and at the meeting after the game the lads got a few things off their chest. Since then it has been great.
"It wasn't a nice experience but we can look back on it as a turning point; the team has taken the positives from that.
"I don't think much has changed but we get the first goal now and that gives us confidence.
"There is a buzz around the place. Everyone is more optimistic about what the season holds for us.
"It is lovely to be winning but we are under no illusions that we have to keep the hard work up to maintain the momentum."
The biggest risk to the club's winning streak will come at Molineux at the weekend and Button is relishing the big-match occasion.
"We will go there in a positive frame of mind and look to win," he said.
"We feel we are one of the best teams in the league and they should be looking at playing Brentford as a big game.
"I am looking forward to it. Molineux is a lovely stadium, it will be a big crowd and hopefully we will have a few fans there too.
"There is a little bit of extra edge as we know both teams will be up there at the end of the season."
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- Graham Westley