Girls! The baby is almost two weeks old, his belly has grown quite big…

Girls! The baby is almost two weeks old, his belly has grown quite big. Gas and colic don't bother him much, in general, he's completely fine. I'm thinking maybe it's just the belly that's swollen or the baby is gaining weight. There should be other signs that something's not right besides the round belly? By the way, the belly is soft. Probably overthinking ??‍♀️