You may still have a case even if you do not feel hurt the same day as the accident. Your body will sometimes send a rush of adrenaline during traumatic situations. This can temporarily reduce the feeling of physical pain. You may start feeling that pain or developing other symptoms later. It is wise to consult a doctor even if you do not immediately feel pain. Some people suffer traumatic stress for months or years after a bad wreck. Sometimes mental stress is worse than physical pain.