I havent personally had any experience with this, but I have seen some bubba's at RCH with little helmets to help shape there heads as they develop. I assume they only need to do that in very severe situations.

I would suggest, as Storm suggested, follow your instinct and get a second opinion, talk to your health nurse or a second GP or even contact your local children's hospital to get an appointment with a peadiatrician.

Good luck with it.