Miss Lambert said she was having seizures up to seven times a day.
“I had an episode in front of my mum for the first time ever,” she said.
“She said ‘you’re having a seizure’.
“I went back to the GP and said, ‘I don’t think I’m having panic attacks, I think I’m having seizures’. The GP said, ‘get your story straight.'”
Jessie said she was told at her third appointment to meditate, focus on her diet and rest.
She was eventually referred for an MRI and EEG scan at Royal Derby Hospital in March 2024 and was found to have a 1.5in by 1in (4cm by 3cm) brain tumour.
Jessie said: “I thought I was never going to get answers.
“Because of my persistence, by ringing everyday and chasing every appointment, I thankfully got to where I am now after being dismissed and even misdiagnosed.
“It took me seven months to finally get diagnosed which for some is seven months too late.
“I just think they should have taken my situation more seriously. I think even after I was finally referred, they didn’t quite believe me still.
“Young people need to be taken seriously.”
Jessie underwent a six-hour surgery to remove 40% of the tumour, followed by six weeks of radiotherapy.
She was told in September 2024 that she had a grade 2 astrocytoma, a type of tumour which is usually slow growing, external.
She still has to be monitored with a brain scan every three months to assess whether the tumour has grown.
Her latest scan showed that her tumour appeared to have shrunk.