Fall Scare

I am posting from my phone cause of reasons. Just a few mins ago my nephew fell. He reacted normal at first crying so I picked him up. Then it got weird. His head fell back and he didnt respond. His arms curled up and his mouth puckered like a fish. He did respond for what seemed like forever. And at that moment I thought I killed him. I was sacred I had killed my reason to live..... He finally returned to normal...no one saw. No one believe me when I say to have him looked at. Im so scared something is wrong....if he is really hurt in a bad way...i couldnt live with it....