Nausea = Hell!!!

I am around 6 weeks and I feel like death!! Nothing sounds appetizing to me at all, but if I don't eat the nausea gets worse! I take my vitamin at night, I eat a few crackers before I get out of bed, I avoid spicy/greasey food, but nothing is helping!! I haven't found anything that helps, and nothing really makes it worse, but I am constantly feeling sick to my stomach. Help please!!