Stay safe and call 911 for a police report. Get checked by a doctor right away....

https://dlf-ne.org/what-if-the-other-driver-changes-their-story-later-a-paralegals-guide-to-protecting-your-claim/

Stay safe and call 911 for a police report. Get checked by a doctor right away. Document everything with photos and witness names. Keep your statements brief and avoid admitting fault. Be wary of insurance companies and watch Texas deadlines.