Anne,
I was nauseated through out my treatment. It started at the 2 week pt as well. I did have chemo too, but the radiation sickness made me nauseated too. After that the thick mucous made me vomit. I didn't do too good a job managing my nausea early on, but once I got a Rx for Zofran ODT(dissolves under the tongue)and used it everyday things got better. Sometimes I would take it orally, but most of the time I took it through my PEG.