My expedience was very similar ro Kelly's. I went down like a rock the last 2 weeks of radiation and the next 2 afterwards. I then was able to start building back up. Good Luck. Keep a positive outlook and look for the silver linings - it definitely helped me.

DX 2/10/09; Stage 1 SCC side of tongue; Partial Gloss; PEG in 3/3/09; 3 Cisplatin; 35 IMRT; PEG out 7/17/09; Eating via mouth and walking 3 miles/day 4 wks after treatment end. 50 pound weight loss; Clear PET 09/09 and 09/10