Zofran! I had what is called hyperemisis (don't remember how to spell it now) and ended up having three high risk pregnancy's. I spent a total of 18ish months in bed between my kids and a fair share of time in the hospital. I know that the first line of defense is generally: ginger pills, saltine crackers, sips of ginger ale (drink before you get out of bed) b12 and unisom (as a combination) often helps most women. The second line of defense is often: phenergen or compazine (prescribed by a doctor but I'm allergic to both) and the mother of all inventions is zofran or ondenastron (the generic form). Generally given in pill form but if you're too sick you can get the 4 or 8 mg ODT (they melt on your tongue) and they prevent you from peuking (generally) and help immensely with nausea. Hope that helps. :) Congrats!!
My doctor gave me special vitamins for nausea called nexa there really good. Try eating salted crackers and small meals hope this helps :-)