20 month minor fall on head, vomited 2-3 times next hr. runny nose &virus too. acts normal. rushed to er, didn't sit still for ct scan. serious?

Depends: The height of the fall generally puts the baby into categories of low risk, moderate and high. Over 8-10ft drop is a higher risk. Also if the babies are difficult to console, they become higher risk. However, this categorazation is used to determine if the baby needs a CT or can be watched for 3-4 hours. If the CT scan is negative there is most likely no more need for further concern.