Get to safety and see a doctor immediately. Call the police for a report, snap...

https://travistrcm708.theburnward.com/what-if-your-injuries-get-worse-days-after-a-car-accident

Get to safety and see a doctor immediately. Call the police for a report, snap photos of the scene, and collect witness info. Be careful what you tell insurance adjusters, as they often try to minimize your payout