My son might have whiplash should i take him to the hospital ?

Whiplash: How severe is the injury? See a physician immediately if the pain is severe, if there is numbness or weakness of arms or if you have any concerns.

I might too..but not: You get the most from this site when you provide basic background information (type of accident, speed before stop, position in car, type of passenger restraint,etc.) and then ask a question. I can understand you are stressed but we really need data to answer better. If the issue spooks you don't wait for an answer just go.