My 9 month old feel off bed and hit head. The next day he had fluid build up on forehead. He was normal with no conclusion symptoms. We took Er and they took exray didn t see anything. They were unable to do cat scan due to baby not falling asleep. They said he might have a small fracture. It s still pretty big and it has been 8 days. Should I take hi, back to doc if it doesn t start going down???