OMG! I am so sorry you are having such a rough go of it. The best advice I have for you would be to just live on the zofran for now. Take it even if you don't think you need it. Just keep taking it until you are done with all the meds and have gotten rid of that water weight. I am pretty sure you won't have to live on it forever, but keep taking it for now until you get over this hump.

My goodness, woman, it's only been a week, right? Give yourself some time to heal. I think nausea is like pain, if you let it take hold, it is harder to push back, so keep taking the Zofran prophylactically for awhile.