Talk to your OB..she'll prescribe you an anti nausea medication!
I was in the hospital and they treated me with IV fluid and gave me prescription and it doesn't work either
Ginger tea helps...taste kind of bitter but raw sugar or honey helps to kick the bitterness.
Also, "preggy-pops" (I think that is what they are called) are great for nausea.
With my first pregnancy my doctor perscribed me pills for motion sickness to help with the nausea. I ended up in the hospital with her several times hooked up to IV's because of dehydration from the vomiting.