Katie Thurston admitted she has no idea "how much time I have left" amid her stage four cancer battle

Speaking in a new Instagram video, Katie said: "My oncologist never told me how much time I have left, and I've never asked.

"Stage four is a very scary mentality at times, because it is forever."

Revealing that a recent biopsy came back benign and she and husband Jeff Arcuri have been enjoying a vacation in Greece, Katie said: "A part of me was like, 'Thank you. Thank you, God, Thank you universe for these blessings and everything you've given me today.' I enjoyed wine. I enjoyed the sugars, you know, the desserts. I enjoyed the memories that I'm making. Because what's the point of not living when you're given today? You know, when you're given life?"

However, she admitted there is always a fear that her treatment isn't working and that the disease is progressing.

She explained: "But there's a small part of me that like feels like a dog before it dies, gets this, like, this big boost, you know. I'm not trying to even make this like a sad video. I'm just being honest that cancer is very much like a trained lifestyle at this point."

Katie will have a new scan next week "to see how meds are working, the good news would be either no growth or even shrinkage".

And, in between scans she does her best to live her life.

She said: "Oftentimes when I'm entering back into the reality of cancer, that's when things start to hit. When those monthly scans or appointments come and go, I allow myself the next 28 days to really forget I have cancer."