Ouch, hope you get better. I don't know what it is you believe, but either way I'll be praying for you.
I don't know what I would put on a bucket list to be honest.
Here's how I'd look at it. If it is confirmed that you're going to die, you can either
A.) do all the things you ever really wanted to do before you die, have a great time, but honestly that's just kind of useless. Living for yourself isn't a very good way to end it imo
or B.) You can put your last days to good use. Try to make a difference. And I don't know what you believe about the afterlife, but if you die, you'll find out if there is one or not very soon. And if that's true, I would put forth a last ditch effort to figure out for sure that what you believe, if anything, is the truth. Put away
all preconceptions and really investigate. And whatever the evidence leads you to, follow that.