First, get to a safe spot. Check yourself for injuries and see a doctor...

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

First, get to a safe spot. Check yourself for injuries and see a doctor immediately, even if you feel fine. Call the police to get an official report. Snap photos of the scene and grab contact info from witnesses