Move to safety first and call 911 for an official police report. Always get a...

https://wiki-view.win/index.php/The_First_Week_After_a_Car_Accident:_What_You_Actually_Need_to_Do

Move to safety first and call 911 for an official police report. Always get a medical check, even if you feel fine. Take plenty of photos and collect witness names right away. Keep your statements brief and never admit fault at the scene