After a wreck, prioritize safety and call 911 to get an official police report....

https://www.ready-bookmarks.win/after-a-crash-prioritize-safety-and-move-off-the-road-see-a-doctor

After a wreck, prioritize safety and call 911 to get an official police report. See a doctor immediately, even if you feel fine. Take plenty of photos, collect witness contact info, and watch what you say to insurance adjusters