Be glad you don't have anything yet. I'm on Zofran because without it, I couldn't keep anything down - not even water. As it is, I still feel nauseous, but the Zofran keeps me from vomiting. If I could be without ms, I would be so excited.
Symptoms are not a sign of how pregnant you are. My mom told me she never has ms with any of us three kids, and here I am unable to eat anything more than saltines and soft pretzels.