What you're describing is acute stress disorder. It is differentiated from PTSD in that it lasts for less than a month.
Melavai, you and your family might want to see a therapist 1-2 times to help process the accident. If you don't and the symptoms continue, then it can become PTSD. Make sure you see someone experienced with trauma.
In the meantime, be kind to yourself. If you can, do some meditation or yoga.
PM me, if you want.