It's not fractures, concussions or even seat belt burn....
Whiplash is the #1 most common type of injury from a car accident. While most people just assume that it gives you a strained neck, whiplash can actually seriously affect your joints and ligaments and even create tears in your muscles.
Make sure to take it easy even after a "minor" accident and get checked out by a doctor. Keep records as well for your attorney if you end up needing legal assistance.