Ita normal,dont worry. My daughter was a week behind, but her head was a week ahead... my son is right where hes supposed to measure, but his head is 2 weeks ahead.. big headed babies for me. Lol. My daughter was born with 13 inch head.
I wouldn't worry unless your doctor said something about it. Babies grow at different rates. I'm just shy of 34 weeks, my baby has been measuring 3 to 4 weeks ahead for 2 months now. I just told my husband I was growing him an NFL linebacker.
Im going to be 30 weeks and my baby is measuring 11 inches, 2 and a half pounds, everything pretty normal except his head is measuring 2 weeks bigger. But it was the same with my daughter and she is completely fine:) she was born with 13 inch head, and it looks like my son will be around that too, my poor vagina... lol dont worry about it, its more than likely nothing, just a smaller baby:)
I am 31 weeks and 3 days and my doctor told me the same thing but i didnt worry because he didnt seem to worry i gess it normal . Babies all grow different and are all different sizes when they are born i wouldnt worry as long as shes healthy This is my second lil boy so im a little more calm But if your to worried just ask your doctor next time you see him