Two thoughts to add.
First - when my wife was diagnosed with multiple myeloma (incurable blood cancer) at age 43, the consensus was for 3-5 years. That was in 2003, 15 years ago. She's not in the best shape today, but she's still with us, and kicking MM's arse. So don't succumb to general rules of thumb.
Second, completely agree on going to a recognized cancer specialty place for a complete work-up and consult. We went to the Mayo Clinic early on, and that visit gave us a more complete picture and lots of options for treatment. We've been back at least a dozen times, over the years - they are always up on the latest research and treatment possibilities.
Best of luck to you in your treatment!