Nissa experienced a number of neurological symptoms preceding her diagnosis
Running through the list of signs, she noted that she experienced several neurological problems, including bouts of déjà vu.
Seizures located in the temporal lobe may be responsible for the psychological phenomenon, causing other strange sensations as well, such as feelings of fear, strange smells, and communication and memory problems, according to the NHS Christy Foundation.
However, not all feelings of déjà vu signal a possible tumour, the charity clarified.
Recounting the years before her diagnosis, she said: “They were so vague but looking back it's so obvious,” adding that she experienced feelings of chronic fatigue “every single day”.
However, she thought she had an autoimmune disease, chronic fatigue syndrome or was suffering from the effects of her Lyme disease diagnosis.
“It was hard for me to even walk up the stairs. It was hard for me to make food for myself, it was hard for me to go to work,” she recalled, explaining how she had stopped working altogether.
“And I thought I was just having issues within myself; I had no idea that it was something so serious.”
A far more common symptom of brain tumours are headaches, which she felt in the base of her skull, right around her head into her eyes.