Is it my fault I got gestational diabetes while pregnant

Everyone in my boyfriends family blamed me for getting gestational diabetes and jaundice and giving birth to my baby preterm. I cry everytime they bring it up. Now I’m pregnant again and everytime I eat a cookie (which is rare but I like to bake them for the kids) they judge me and y’all shit behind my back.

Please tell me if it’s my fault I mad my daughter preterm or because of my gestational diabetes