Hi syoung,
I had 6-1/2 weeks of radiation to both sides, weekly cisplatin and erbitux, daily ethyol shots (for tonsil cancer with two lymph nodes - I also had a modified radical neck dissection about 3 weeks before radiation). I was 52 when I was diagnosed, and in very good heath otherwise.
I did not get a PEG and I only lost about 5 lbs. My RO said I could get one later if needed, but I did OK.
Eating became a big problem quite quickly, so I settled on a simple meal three time a day - it consisted of an egg-beater omelet with cheese and sometimes ham, 2 Boost Plus, and tea with honey. Just prior to the meal I used the "magic mouthwash", which numbed my throat just a little. Without this simple meal, it would have been very difficult to get my calories - but I did get them!
After a while, I also started taking a tylenol with codiene mixture which helped with the raw throat. I also did multiple daily mouth rinses with a salt/baking soda mixture. Of course I drank a lot of water.
I exercised every day - light weights, floor exercises, and stationary bike. Nothing too strenuous because I didn't want to burn many calories (since they were so hard to injest). I also generally took a daily walk with my wife. I think the exercise helped immensely.
I had other side effects which were treated with various medications. I took steriods for the last several weeks of treatment (for an erbitux side effect), and they may have helped somewhat with the raw throat.
Everyone is different, however, and it takes a good amount of discipline to get the calories and liquids - there can be no excuses to stop eating.
It was not an easy journey, but for me it was also not horrific. Finally, I'll give a lot of credit to my wife as my caregiver. She helped in so many ways I can't even begin to say.
Best wishes,
Chris