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.
I was in the hospital and they treated me with IV fluid and gave me prescription and it doesn't work either
Talk to your OB..she'll prescribe you an anti nausea medication!