Hope you are feeling better soon, i had severe hyperemesis throughout pregnancy, but for many woman it can ease off in the later half, hope that is the case for you.
After several visits to the doctor and checks showing i was dehydrated, I was presribed stemitil and metaclopramide (sp?) but these did nothing for me - i think i had a bad reaction to Stemitil it made me very agitated, but not necc same for you of course.
I had several stays in hospital on a drip to get rehydrated. The constant nausea really got me down. I think it depends also on your doctor. i saw one who told me it was all part and parcel of pregnancy. I went to see my own doctor in tears, saying i couldn't cope and wanted to think about a termaintation, it was then that i was prescribed Zofran, it is a drug given to Cancer patients having Chemo, and is very exspensive for Doc's to prescribe, it worked for me though and i was able to keep down two light meals a day.
It is a shame that i had to get to this point in my pregnancy before Zofran was presribed, and when i moved and had a new doctor they seemed shocked that i was on it, and made me feel quite bad about the potential side effects on my unborn baby.
My darling boy was born fit and healthy with no health problems to date, if it hadn't been for Zofran i am not sure i would have him now. As i understand it, there is not conclusive evidence that these drugs harm the baby.