Sick need help

I need help battling nausea and vomiting. With baby number one I had severe HG and I can't get that way again. I'm trying everything- small meals, ginger candies and tea, crackers, crushed iced:( please help me. My daughter is now 5 and I can't feel like in helpless in caring for her. My husband is going to be so over worked:( the part that makes it bad some times is the darn saliva problems.