A car accident isn't something that goes away when your car gets fixed. It's not something you forget about once you get out of the hospital and your injuries heal. It can stick with you for a long time.
One man wrote about being involved in a crash that was not his own fault. A motorcycle went through a red light and smashed into the side of his car, totaling it.
As the accident happened, the song he was listening to on the radio was "You Can't Hurry Love." Not only was it an ironic choice as a motorcyclist tried to hurry and ran the light, but that song forged a connection in with the crash in his brain. If he heard it later while he was driving, he said that he instantly expected another crash. He felt nervous and overly cautious on the road.
He did say that the connection faded a bit with time. It got to the point that the song always made him think of the crash, but he didn't have the instantly nervous reaction of expecting a second crash.
The psychological impact of a car accident is sometimes easy to overlook. If you don't have a physical disability and your injuries heal, it's easy to assume that you're fine. However, you may actually need significant treatment for mental difficulties or even post traumatic stress disorder after the incident.
When you do have these types of issues and need treatment, it can get expensive. Everyone heals at different rates. Do not forget that you may be entitled to financial compensation if someone else caused the wreck.
Source: Logic-Based Therapy and Everyday Emotions: A Case-Based Approach, "Chapter 3," Elliot D. Cohen, accessed March 28, 2017