The 22-year-old broke down into tears after finishing off the podium for the fifth successive time at the London 2012 Olympics following her last swim as part of Britain's 4x100m medley relay.
While not admitting it, Halsall would have had high hopes of medalling having claimed world silver in 2009 and five at both the European Championships and Commonwealth Games in 2010.
Halsall also battled back from a broken ankle suffered in late in 2010 while, as revealed by former coach Ben Titley in the aftermath of the Games, she was struggling with a shoulder injury in London.
Individually Halsall finished fifth in the 50m freestyle and sixth over double the distance at London 2012 but in the 100m butterfly she failed to make the final, ranking 14th overall.
Add to that fifth in the 4x100m freestyle relay and eighth in the 4x100m medley and Halsall spent nearly two months after the Games dealing with her disappointment.
However she looked well on her way back to her best at the World Short Course Championships, winning silver in the 50m freestyle in 23.87seconds on the final night in Istanbul.
And, working under new coach James Gibson, who helped France's Florent Manaudou to Olympic 50m freestyle gold at London 2012, Halsall insists things are starting to look up.
"I wanted to come and enjoy swimming again. The only reason I came was because I needed to start enjoying racing again and knowing how to swim fast and how to win," said Halsall.
"I lost a bit of confidence after 2012, the medal does not make up for it, but it is a step in the right direction. I'm in good hands with James and the future is bright hopefully.
"After the Olympics I literally went home and probably spent a good six weeks moping around, I didn't attend the parade and I didn't speak about if for at least a month afterwards.
"I didn't look at anything to do with the Olympics, I just couldn't bring myself to, and I came to the worlds because Sports Personality was on and I didn't want to celebrate that either.
"Everyone else did an amazing job and I just didn't feel like I wanted to celebrate that kind of stuff. It has taken a good eight weeks of training to start to feel like myself and I have got good people around me who believe in me and inspire me and it is good."
- Sports & Recreation
- London 2012 Olympics