Oh dear, Ethel: you are suffering far too much since your diagnosis. All I can offer is empathy and some practical advice.
My brother in law has cancer of the oesophagus. He has finished his chemo and radiotherapy for now, and has been researching his disease. It has only a 5% survival rate, so he is ensuring he is part of that magic 5%. Every day he improves a little through the correct diet (though at present it is all pureed) .
The most important thing is diet: cancer feeds on sugar, so avoid sugar and starch at all costs (starch can break down into sugar). Use the ketogenic diet - ie high fat, low carb: lots of meat, oily fish, green veg, all veg, some fruit - not too much because of the fructose, plenty of eggs and cheese. Forget cholesterol worries - much of it is overstated anyway.
My older brother had brain cancer and after the standard medical treatment, he too went on the ketogenic diet and has been in remission for years.
If you find this a bit over the top, at least cut out sugar in all its forms. The ketogenic diet kept my brother healthy, and is aiding the recovery of my BiL. It works.