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

https://www.expertlawfirm.com/what-to-do-after-a-car-accident-in-texas-a-step-by-step-legal-and-practical-guide/

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