Hay, totally normal yan sa early pregnancy, lalo na kapag first time! A few of us moms din experienced zero appetite around that time, parang walang lasa ang pagkain or nauusog lang kami agad. It usually gets better after the first trimester kaya hang in there, but since you're six weeks pa lang, best to mention it to your OB just to make sure everything's on track and na okay ka talaga, especially if you're struggling to keep anything down.