Crazy nauseous

For the past week I've been nauseous from when I wake up to when I got to sleep. Last week I kept getting cravings but now I can't stand the sight of any food. I haven't vomited at all I'm just crazy nauseous. It's really hard to eat anything at all, because I feel horrible after I eat anything. Does anyone else have this problem? Or does anyone have any tips on getting rid of nausea?