Jen,

Don't underestimate how important nutrition is. It would definitely be great if you can avoid the peg tube, but if you start losing too much weight you should definitely consider it. Also, my Mom's Cancer Center (in Philly) did a great job of monitoring her blood counts and her nutrition, which I truly believe made a huge difference. Before she started treatments there, her Vitamin D levels were extremely low so she needed to take supplements.

I definitely agree that, although unpleasant, it's better to over-attack the cancer than under-attack it. Make sure you stay hydrated sufficiently too. Usually you can get hydration treatments right in the hospital via IV. Very important (especially when getting chemo).

Good luck with everything.