Travelling with lung cancer: I have no idea about travel insurance

Hi , I have incurable lung cancer, I am 5 years on from diagnosis and have had 2 years of immunotherapy which has shrunk my tumours and so far they have remained shrunken and stable. I am currently in really good health. My daughters bought us a girls trip to a spa hotel in Budapest for my 60th birthday last year and as I'm not a seasoned traveller I have no idea about travel insurance. We are due to travel next month so I'm currently looking for advice. I've looked at staysure then I get to the part where they ask is your cancer terminal. I know it's incurable but would that be classed as terminal even though I'm in good health at the moment? I used their chat and they couldn't say whether it's classed as terminal or not. I would appreciate any advice from someone in a similar situation.  Thank you