Worried my baby isn’t healthy

I am around 5weeks 6 days . I just found out about 2 weeks ago . And this is my second pregnancy . They say you usually have everything earlier than your first. But my only symptom is I’m so hungry . I never get full at all !! Sometimes I have to eat very slow so I don’t throw up but I’m really never ever nauseous or haven’t threw up . Also . I’m very concerned because I NEVER EAT !! At all . Or drink anything . It’s not intentionally this is how I was before I was pregnant . I’m wondering how harmful can this be to the baby? Will it cause the baby to die?? What if it already passed away and I don’t even know yet because I haven’t called my doctors yet or anything ?