Need answers

MaKayla • 21• Married to my Middle school Sweetheart! • PCOS • due with #1 on 07/01/2020

Im 16 weeks 4 days ... I always thought a pregnant lady was supposed to eat everything in exsistance lol . well now im finally pregnant and i am finding out that isnt really true ? I eat only a little at a time before i feel stuffed!! But then im hungry 20-30 minutes later ... Is this normal in pregnancy?