Our pediatrician said the same thing, and sent us to a cranio facial surgeon where he did a CT Scan of his head. The doctor did say that they were closing quickly, but said every kid develops at their own pace, and it's not necessarily bad that it's closing this early. From the scan we saw that he was just fine and normal. He felt my older sons, who is 3, head while we were there and said he had the exact same shape. We just musn't have noticed it as much because his hairline was much more different than our youngest. I just wanted to give you a positive story, and let you know it could all be ok. We were lucky and got into the scan the next day after our ped recommended it, but that one day I was in tears almost all day, so I know it's stressful. Good luck to you, and God bless.