Simone Nathan didn't know at the time, but she was suffering from endometriosis.
The condition happens when the tissue that lines the uterus grows outside of it, causing pain, bloating, mood swings and, in severe cases, infertility.
Although so common one in ten Aussie women are affected by it, the debilitating condition is often misdiagnosed. The answer is not clear on what causes endometriosis.
'I bloated so much I looked like I was six months pregnant and the pain was excruciating, sometimes so bad I would lie on the couch unable to move,' she told Daily Mail Australia.
'It got so bad I couldn't even have sex with my husband anymore because it was too painful.'
Posting glamorous fitness to Instagram, Simone's life looked perfect, but inside she was masking incredible pain.
'I just pushed through and made myself go to the gym because I have such a passion for it. I would just push and push,' she said.
Over three years, Simone saw GPs, dieticians and gynaecologists, but still didn't have a diagnosis.
'I started to think I needed to see a psychologist because I saw so many doctors and had every test under the sun but still didn't know what was wrong with me,' she said.
'It really gets you down, I was constantly in a mood and exhausted and thought maybe it was all in my head.'
Eventually, the condition was discovered when Simone was referred for keyhole surgery to check her uterus.
The condition was quickly discovered and the rogue tissue removed with a laser on the spot, ending three years of pain and uncertainty.
For more information on endometriosis head to Endometriosis Australia.
This article originally appeared on that's life!