Bill,
David's story is something to keep in mind anytime you start to dismiss something as not important. Mention everything, no matter how trival, in your weekly Oncologist appointment. This is not the time to "man up". I kept a written list/diary to use.
David was my "mentor" during IGRT, as you can see if you looked at my thread. I will say that most of my problems were summarily dismissed by the Oncologist as "stress" or related to my previous colo-rectal issues, but I was also checking in with my GP every couple of weeks (there was no reason not to once my deductible and co-pay were clearly going to be blown out).
Because he has a lot of "average folks" who have had the normal batch of cancers and radiation, his view of the impact of radiation is completely different. He suggested a free booklet from the American Cancer Society about radiation in general (I think you can download it from their site), and went over each of my "complaints" at each appointment. He was very convinced, and in a sense reassuring, that the symptoms were real (and painfully normal)side-effects of RT, and we talked about what to do. Now mind you that I did make sure both docs were aware of any meds, and I had the Rad oncologist prescribe everything to keep some sanity in it all. Now that has all passed back to my GP, and he is following the progress.
I think the stress, if there was any (except the water torture), died off quickly, as I developed a good routine, except driving through a construction zone with "enhanced enforcement" every day. Because the techs were all very pleasant, and the folks before and after me were sociable, it became a good part of the day. Beat spending the morning in the office.