Should I still fly? Dentist just told me I need root canal work?

I went for my annual check up at my dentist as one of my tooth get quite sensitive and although he saw nothing at first, when he took an xray he said I needed some root canal work! He never saw it the years before as it was besides a filling that went wrong. It’s only painful if it gets exposed to cold or I bite on something really hard, and then it goes away, I can’t feel it otherwise.

Problem is I’m going away next week, I’m flying to Singapore for 7 days and he said since I was not in pain he would rather do it after I’ve come back as it was too short time to heal. But at the same time he said I should take some painkillers and some anitbiotics at the ready, and a good travel insurance “just in case” which doesn’t fill me with confidence.

Don’t know what to do (plus it would cost a fortune which I don’t really have since I’m going away), last thing I want is find myself on a plane in terrible pain, or while Im there (travel insurance or not), but then he said he can’t really do any work now as not enough time . What shall I do?