The 30 year old has more than 60 caps for her country and found the net 20 times in green and gold, but admitted today that she's at the end of the road for her international career.

"I really wanted to fight for that, but my body isn't going to allow me to do that – my mind isn't going to allow me to do that," she told Fox Sports today.

"I am officially retiring from the Westfield Matildas."

Heyman has played for four different W-League sides – including Adelaide United last season – but she made her biggest impact during her eight year spell at Canberra United, scoring 56 goals from 93 games between 2010 and 2018.

She won the Golden Boot twice, two Championships and three Premierships

But she also revealed today she managed all that while suffering clinical anxiety.

"I've had an amazing career and I've enjoyed every experience that I've been able to have with the Matildas, and it's been one hell of a ride," she said today.

"My road to becoming a Matilda was definitely a little bit different from everyone else, the only Matilda to never play as a Young Matilda.

"I was playing for Central Coast Mariners at the time. The first I heard about being selected for Matildas camp was at the W-League awards back in the day when Tom Sermanni was the coach.

"He came up to me after the awards and offered me his email and phone number and said that he'll get in contact with me.

"I called my mom straight away after the awards and was just like, so this man Tom Sermanni gave me his details, not knowing who he was. And that's where my journey all started from..."

But she added: "During my time at the Matildas, I suffered a lot from anxiety, I really didn't understand what was going on.

"I would try and go to bed but couldn't, couldn't sleep, and then start panicking about my breathing and actually have a couple of panic attacks most nights, which was a big struggle.

"I had no idea what it was."

The anxiety wasn't helped when Alen Stajcic took over the Matildas – the same coach who had dropped her from Sydney FC after three games earlier in her career.

"When Staj got the job for in 2014, I was a little bit anxious, I definitely felt uncomfortable," she admitted today. "I was unsure of what my career was actually going to be for the Matildas anymore.

"We both sat down and we both spoke about our differences, and we both decided that the best for the team was for us to just drop everything and forget what happened in the past.

"It was a big release. I felt like I didn't have to carry him on my shoulders anymore."

She added: "He was tough. But for me, that worked. I think it worked for a lot of the girls.

"And I think we became better players – fitness, our tactical, technical skills definitely improved, and we became professional."

A series of injuries has curtailed her career recently though.

"Since 2016, I had an issue with my ankle which put me out in the game for 9 to 12 months," she said.

"I was lucky enough to get myself back out onto the field and straight away, I ended up putting my knee out at the Asian Cup in Jordan.

"I tried to come back and I just didn't feel like myself. And I finally felt that it's the right time now to hang up the boots and focus on the next part of my life."

For now though, Heyman said she would most miss her Matildas room-mate Katrina Gorry.

Tearing up at the thought, she added: "We were attached at the hip, my best mate.

"That makes me actually a little bit more emotional than anything else. She was my support system the entire time throughout my career."

Heyman added: "I know I've achieved what I ever wanted to achieve. I've ticked all my boxes that I set out to tick.

"The only one that I did fail with was bringing home the gold medal from the Olympics. It's something that I've always wanted.

"And I really wanted to fight for that in the 2020 Olympics coming up, but my body isn't going to allow me to do that. My mind isn't going to allow me to do that. 

"I'm just ready now to focus on myself and focus on my career outside the sport and who knows what's going to happen after this.

"But for right now, I know this is the best decision for myself and I'm ready to go with it."