My daughter is 7 weeks old and already her 0-3 babygrows are too small I think 😩. They fit fine on the arms and body but she can't straighten her legs fully and some of the feet on them are too small. So I've just been putting her in vests/ leggings and socks. I've got her some 3-6 months babygrows though and they're massive on her?? Am I doing something wrong? New to all this. Should I just stick to the vest and leggings combo until she's big enough for 3-6? I'm worried her legs and feet will be damaged in the 0-3. When did your babies move up a size?