Treatment helped shrink the tumour and while doctors never gave Jessica a timeline, her insurance company said she only had a life expectancy of 12 to 14 months.
However, Jessica has now been fighting her cancer for three-and-a-half years, taking it one day at a time.
"I think only 5 per cent of patients make five years and now I'm at about three and a half years," Jessica told news.com.au.
"I say it's a bit like a tightrope, because it's like you want to be happy and excited but you also want to be realistic."
Jessica said she embraces the days when she can go about her normal life but has to be patient when she can barely get up and move around.
Since her diagnosis, Jessica has ups and downs, with another tumour being discovered on her brain in May last year.
"I was cooking dinner one night, and I don't know, I was getting like really overwhelmed over something when (partner) Kilian came into the room," she said.
"I tried to explain to him and I couldn't speak, like I physically couldn't form the words, so then we both started panicking a bit."
Jessica thought she was just flustered so the pair sat down for dinner but when Jessica still couldn't speak, they drove to the emergency room of the hospital Jessica goes to for her treatment.
A CT scan didn't show anything but an MRI the following day showed another tumour had grown underneath the existing one – however this time it was on the Pons, which is the part of the brain that controls involuntary functions such as sleeping, eating and breathing.
Doctors said radiation could shrink the tumour but it could have side effects that could impact her speech, among other things, forever. But, if she did nothing the tumour would grow and the same thing could happen.
"It was scary. But in my mind, I'm like, 'well, if it's going to happen anyway, I might as well just give it a shot'," Jessica said.
Her fate was sealed when blips were discovered on her spine when she was preparing for radiation – more cancer.
"Doctors couldn't radiate like my whole spine and my head straight away, so I did another type of chemo for a little bit," she said.
"And then the one on my brain started growing, and that's when they were like, 'Okay we need to focus on that one'."
Jessica ended up having to do four weeks of radiation following the discovery of the tumour that was not responding to other treatment.
But, it sparked another conversation between her and her partner Kilian about marriage – the same one they'd had the first time she was diagnosed.
"We talked about it, and I was like 'no, like we'd always said we'd live together first and like, I don't want to rush into it just now that I have cancer'," Jessica said.
But when the second tumour developed, the pair had been living together, and they decided they would take that next step.
Their proposal was unique, with Kilian getting down on one knee on the side of the road after lunch with Jessica's family.
"Another snap lockdown was announced, and Kilian pulled over to the side of the road," she said.
"I kind of knew what was happened but I didn't want to get my hopes up – but then he proposed."
The couple pulled together a wedding in six weeks with the help of friends and family, having a wedding of 60 due to constricted budgets.
Jessica had been studying taxation law when she was diagnosed and has been unable to work since.
However, she describes it as a fantastic day she wouldn't change for anything, getting lucky with the weather and getting to celebrate her love with her high school sweetheart.
Jessica has decided to share her story to support Canteen, an organisation developed to help young people and their families touched by cancer.
She said the community is what helps her so much, and a place to go where people understand what she is going through.
"I was being a little slow in the leadership meeting the other day, and I joked it was what brain cancer did to you. It would be a morbid joke anywhere else," she said.
"But one of the other girls turned to me and commented how good it was to say those kinds of things around people who understood it."
Jessica said being unable to work meant she had as much time as possible to give back to the place that had helped her through, and bring it to the attention of others who may be going through similar circumstances.
