Yeah, I have terrible nausea too (fortunately I'm not vomiting), and a few things that help me are some carbonated drinks like ginger ale, 7up, and ginger flavor italian sodas (no cream or wip cream...just the soda and the flavor shot).
The chewy ginger candies are great too. The effect is temporary, so make sure to have a few in your purse.
One more thing is carbs! yes!! bread with cream cheese and pasta are my faves, it really does the trick for me.
The odwalla drinks (and tofu) help me not to feel too guilty about not eating much meat these days. I CAN'T even look at chicken

beef is alright, but I don't want to be eating beef everyday.
Just keep reminding yourself...it's for a good reason, my babies are growing. Ah! I know I don't feel like it half the time because they make me nauseous too, but take your vitamins, if it's too bad, take them just before going to bed.
I hope you feel better soon.