Samething happened to me with my first. I got hospitalized for dehydration and not been able to keep anything not even water. There was nothing i could do i would try eating something small like crackers even though i would still throw up. It got better by my second trimester and was able to eat more and more. All you can do is wait it will get better for you try eating smaller meals even if you throw up and drink your vitamins.
Talk to ur doc...they can give you an anti-nausea prescription..forget the name of it right now, but I had to use it my second pregnancy!! It really helped!! :-) hang in there hun!!!