Susan,
My husband had multiple cycles of BCG treatments in 2002. At one point, I don't recall if it was right after a treatment, he felt awful, as if he had the flu, nauseous, etc. His doctors were always wonderful and available throughout this entire cancer journey. I called and spoke to the doctor who then ordered something for the nausea. It is great to be able to put questions out there, but I always believe that your doctor's office is the best resource - contact them. Don't be timid as it is no time to be timid. (At one point we had to step it up, and see another doctor to whom we were referred. Within a week of our visit with this doctor, I called the local doctor and told him it would not work, explained what had taken palce to that point, and asked him to refer us to someone else. He did.)
I hope you will be feeling better today. Do something nice for yourself or have someone do something nice for you. =)
jc10fc