My father was diagnosed with stage iv cancer twice. He had surgery, chemo and radiation, and then it came back and he had two more surgeries. He recently had a forth surgery to remove his hardware from the second surgery.

Definitely talk to your care team. If a treatment exists, they're the ones who know about it and have the right information. My dad's doctors did not give him false hope. Sometimes they were brutally, unflinchingly honest about his chances. I think mindset is important in these situations.

They told dad after the reoccurance that immunotherapy could be an option for him, as he had had the maximum radiation he could have, but thankfully he hasn't needed it.

Hi there,
Im sorry to read your story and hope that this still finds you enjoying your days.
My husband was fortunate to be operable despite being stage 4 scc in the mandible however he refused all follow up radiation and chemo even with a positive surgical margin, nodes involved and many other things that dont bode well.
I don’t know if what he is doing naturally is working yet as we are only 10 months post operation.
He has a naturopath and would tell you to eat clean, cut out all sugar, eat lots of greens and use a frequency device (Google it).
Not much to go on but there is a lot out there that may provide you a little comfort.
Take care and god bless