Hey Kerri -same thing happened to me around week 3 - my swallow just wasn't going to do what I know it needed to do. It took a couple days to get my PEG in so I went for daily hydration sessions which helped a lot. It was a low point for me though- I felt like my body was betraying me!
I hope you're able to get alternate nutrition ASAP - I know you know how important adequate nutrition/hydration is.

Hang in there Kerri - you WILL get through this!
Jen

Jennifer (39)
02/10 SCCa Tongue & Base, HPV-
03/10 Partial Glossectomy & ND 11/10 Revision due to additional nodes 12/20-2/2/11 IMRT & concommitant chemo 2/11 PEG in 3/11 PEG out
Back at work and feeling good 03/24/11!
12/20/11 - 9 month f/u PET/CT - all clear!