"This photo was taken a few hours before I was diagnosed with stage 4 lung cancer.
"I'm 30 years old, a personal trainer, runner, non smoker and healthy eater.
"When you have cancer you won't necessarily look ill on the outside.
"The symptoms might be much more subtle and only show themselves occasionally.
"Unfortunately my symptoms were brushed off as asthma by many general practitioners."
She explained how important it is to talk about any potential symptoms you might have until you get the answers you need.
"The moral of the story is this, if you feel unwell for whatever reason, it doesn't matter how silly you might think it might be.
"See your doctor, question everything and keep going back until you get the answers you need."
But the fitness enthusiast, who runs marathons, is determined to beat her illness.
She said: "This has been the most emotionally and physically challenging week of my life, but now it's time to fight this!"
Lung cancer is one of the most common and serious types of cancer and around 44,500 people are diagnosed with the condition every year in the UK, the NHS says.
There are usually no signs or symptoms in the early stages of lung cancer.