I felt the same. I described it as feeling "grossed out" all the time, but I was rarely actually sick.
What helped: ginger beer from Whole Foods (can't stand it if I'm not pg), grapefruits, lemon juice in water, and avoiding sweets. I would be so hungry I would just eat whatever I saw, like a doughnut, and then I would be, oh yuck! When I learned to eat less hi-carb sweets I felt better. Also, follow your cravings-- whatever you want to eat, eat it! Plus, whatever you eat, lay down a layer of potato chips in your stomach first.;)
Hang in there!!