Sorry you are feeling badly.
This may be of no help, but when I was in the hospital recently it turned out that the drug zofran was itself contributing to my constant nausea. It got so bad I would vomit within a mintue or so of the nurse injecting the zofran. They injected me with another drug, (never found out which) and I finally got some relief and I was able to eat for the first time in two and half days. Speaking of injecting, my neighbor who suffered from nausea during pregnancy told me she been issued a wear at home iv set up. Perhaps something like that could help you so you could try out stronger anti-nausea medicine so you could get some relief.
UC since 10/05, first symptoms felt as early 1983