Stay safe, pull over, and call 911 for a police report. See a doctor...

https://remote-wiki.win/index.php/How_to_Document_Road_Conditions_After_an_Accident:_A_Paralegal%E2%80%99s_Guide_to_Protecting_Your_Claim

Stay safe, pull over, and call 911 for a police report. See a doctor immediately, even if you feel fine. Snap photos and grab witness info. Never admit fault to anyone and don't rush insurance statements. Texas has a strict two-year claim deadline.