Mollie O'Callaghan, Australia's most successful swimmer in Paris, says she's just getting started.
O'Callaghan, aged only 20, has five Olympic gold medals - the only Australian with more is her now-retired swim teammate Emma McKeon, with six.
In Paris, O'Callaghan won three golds, a silver and a bronze.
"It has been an emotional, draining week," she said.
"I have had to try and keep myself together.
"There's been a lot of happiness, a lot of sadness, and it's really hard to process.
"This my second Olympics but it's my first time racing individually and being able to swim in a final so it's brand new."
O'Callaghan won two golds as a relay heat swimmer at the Tokyo Games three years ago.
And now her Paris campaign is finished, she needs "a good, long break".
"I need to have a mental break," O'Callaghan said.
"People don't see behind (the scenes), us training every day. It's really, really mentally draining and it's really tough.
"We are so self-critical, we're so hard on ourselves.
"We drain ourselves every day ... we're just doing laps in the water but we're doing everything that it takes to get a few little seconds off (our times).
"I need to reset myself and re-evaluate ... think about the things that I could have done better, what I could have done more for this team.
"This is the beginning of my career and I have so much more to go."
