I cant really compare these two cases, but I will try.
My grandma got diagnosed with lung cancer around 5 years ago.
The doctor basically gave her 3 months to live, so basically a death sentence.
she started kemo almost immidietly and after a month the doc told her that she even might not live the expected 3 months.
Now here 5 years later she is fresh as ever

So I wouldnt listen to everything a doctor says, and I encourage you to stay positive no matter what.
I will be rooting for you here from DK, and if you ever feel like or need to talk ill be happy to