Leena,
My mom went through a really tough time with the radiation and chemo she lost her voice and had the most horrible sores in her mouth after just 2 weeks of radiation but now almost 4 months out she has really good days and went back to work the first week of June. She started at about 170 lbs 5'8 and is now 130 lbs with lots of loose skin due to muscle loss. She likes being thin but I think she could stand to gain a few pounds. She never had a PEG tube and like you had a really rough time eating so stuck to mostly milkshakes for the first month or so after treatment. There is really high calorie shake recipe on the website and she lived off of those for the first 2 months and now she is eating pretty regularly.
Everybody here is wonderful and will be there to answer all your questions and concerns as you go through the healing process. I know that my daughter (9 months old tommorrow) is the light of my moms life and always brought a smile to her face. She still gets tired very easily and has a hard time making it through her work day at this point but every week she feels a little better. Its a very slow process but it does get better. So keep your chin up!
Take Care,
Dani