DS (DC4) turned 3 this week. Since he was born he has had a misshapen head. Had a wonderful HV then who noticed it but said she didn't think it was an issue, all other checks were always ok, just a funny shaped head. The back of his head is a lot more pronounced, almost cone shaped. I now wonder if it could be having an effect on his brain and therefore his development.
His speech is not very clear, he seems to be missing/struggling with a few sounds, but can use short sentences and generally articulate what he wants. Understands questions about what things are or his opinion on things and basic commands. He knows most colours and basic shapes, can count to 11 but circles back to 8 because he says "seven" and "eleven" in the same way 
He didn't walk until a few days before he turns 2. Was a super fast crawler, crawled at about 7 months. He is still very unsteady, and seems to swing his legs as he walks, IYSWIM, so his foot doesn't always land in front of him, but in front of the opposite leg, or further out to the side than it should and his arms flail everywhere!
He can hold a pencil in the correct way, but can't do more than scribble, not even draw shapes.
HV (who tbh is not wonderful and have heard many accounts of he being dismissive of children with quite obvious issues) says he's fine, a bit behind but he'll catch up. But the longer we go on, the more concerned I am.
Would you contact GP about this, or will I be laughed out of the surgery??