United Kingdom, June 2 -- Katie Thurston is suffering memory loss and her hair is coming out in "clumps" amid her cancer treatment.

The 34-year-old star is battling stage four cancer and though she is still feeling optimistic, she admitted there are days when she allows herself to feel bad because having the disease "sucks".

Speaking in a video shared to Instagram, she said: "I wanted to do weekly check-ins that are just like uncut, raw emotions of whatever comes to my mind. I just finished my second month of treatment and if you're asking how long treatment is, technically forever.

"I am optimistic about medical advancements in the future. Fingers crossed as a stage 4 girly.

"But right now, after finishing two months of my medication...