There’s white stuff near the yolk of the eggs I bought from you, is it a baby chick?

The opaque white portion of the egg near the yolk is NOT the beginnings of a baby chick. This is called Chalazae (n. pl. cha·la·zae (-z) or cha·la·zas). All eggs are candled before being shipped. (Candling is the act of putting the egg in front of a light to visualize the quality of the contents.)