Thanks everyone. I know its easier said that to stress out but i will - guarantee!!! My cousin had a 41cm head at birth, DH had a 38cm and i had a 37cm. No one (unless born early) has had anything less then 37cm, or under 8 pounds!!!!! But hey if my grandmother gave birth to 5 fat head big boys over 40 - 60 years ago a i guess i can to (although she did think i was clever going early with DD and not push out the big baby)