Claudia,
Sorry to post so late but just getting back. I too lost a lot of weight however not as much as you, only 50pounds. I went 7 months after radiation without eating or drinking anything, my tongue and throat were so swollen I couldn't even drink water. Thank goodness for the PEG tube. I took Ensure Plus, 300calorie, 9 cans a day and was able to put weight back on. I was also able to keep hydrated through the tube just extra water a day even smashed pills, dissolved them in water and took trough tube.
I can now eat a little but it takes a long time. I still use the tube to supplement nourishment.
It gets better just hang on.