When should I worry?

I’m 7w2d and my nausea has been really bad since 5w. Today is the first day that I’ve actually thrown up. But I’ve been throwing up all day and I’m getting worried. I haven’t been able to eat anything. I get hungry, but right when that happens is usually when I throw up. And it’s literally just dry heaving. It hurts so bad and it tastes terrible which is making me throw up more. Is this normal? If I eat something will that stop the vomiting? I’m so nauseous non stop.